By referring to a table given on page 30, the proportions of the two oils can be inferred. Chapter iv. deals with Magenta. It is very long, and, although one of the most important in the book, affords few passages suitable for quotation. To some readers the following may be new:Every aniline salt yields magenta when heated with pure aniline to 150° C. Sulphate of aniline, heated to 200° C., turns to a violet black, and then yields, when treated with water, a solution of magenta. In a similar manner, hydrochlorate of aniline is transformed into a red colour, by heating it dry, and mixed with sand or fluor spar, for three hours to a temperature of 180° C.

"To produce magenta in this manner on a large scale, according to M. Delvaux, one equivalent of hydrochlorate of aniline is mixed with tenfold its weight of sand, and one equivalent of aniline. After agitation, the mixture is heated for fifteen hours, at from 110° to 120° C., or five to six hours to 150°, or two to three hours to 180°. The mass so treated is then put into boiling water, by which a large quantity of the red colour is dissolved out."-(P. 47.)

The chapter concludes with an account of leukaniline and chrysaniline.

Chapter v. brings us to aniline blue and violet. The methods of Perkin and Church, Koechlin, Béchamp, Crossley, Beales and Kirkman, Phillips, &c., are described, and afterwards the much more important processes in which the colour is obtained by the alteration of salts of rosaniline. The following remarks upon Hofmann's violet will be found interesting:

"The iodide of methyl, amyl, propyl, or capryl, may be used instead of the iodide of ethyl in the above process, and instead of iodine, bromine may be used. The new violet has a richer colour, and its shades are brighter, than those of the common aniline violet. It was at first manufactured by the firm of Simpson, Maule, and Nicholson, to whom the patentee sold his privilege. Soon after, a German manufacturing chemist, Mr. Rudolph Knosp, of Stuttgard, began to make this violet, and it is now made by every continental manufacturing chemist. When dry it has a splendid metallic lustre. It is sold also under the name of primula.

"In the manufacture of Hofmann's violet on the large scale, the proportion of iodide of ethyl is considerably diminished, in order to save the expense of the iodine. According to my own researches, 12 parts of iodide of ethyl are sufficient to transform 16 parts of magenta into Hofmann's violet.

"It is remarkable that German chemists did not at first succeed in producing the blue shades of violet, which are so easily obtained in England, and the bluish shades could only be produced by using iodide of methyl instead of iodide of ethyl. This interesting point is easily explained, for the methyl substitute formed by using iodide of methyl is of an intensely blue colour. It was not necessary for English chemists to make a direct use of this methyl compound, since at the exorbitant price of alcohol the much cheaper methyl-alcohol was always used in England to dissolve the magenta and to render it capable of transformation."(P. 71.)

The four next chapters are occupied respectively with green, black, yellow, and brown dyes, and would yield many quotations if we could spare room for them. Lastly, chapter x. gives some directions for the determination of the tinctorial power and intensity of the aniline colours, together with a short account of Pohl's method of distinguishing aniline colours from one another, and from similar colours when on the textile fabric, by means of strong and dilute hydrochloric acid.

The Exhibition Report is crowded with interesting matter from beginning to end, and our only difficulty is to know where to choose our quotations. We select the following passages almost at random:

"In France three millions of tons of coal are carbonised annually to supply coke for metallurgical purposes. When

the process of MM. Pauwels and Knab is more generally adopted there will be collected from this 125 or 130 millions of kilogrammes of tar, which would yield 2 or 3 millions of kilogrammes of light hydrocarbons. It may therefore be predicted that the price of benzols will fall still more, and that consequently the cost of colouring matters derived from it will be reduced. These prices are at the present time from 70 to 80 centimes the kilogramme for benzol; in 1862 it was worth three or four francs the kilogramme. Aniline, which then cost from 12 to 18 francs, is now worth 2:25 francs, or 3'5 francs at the maximum. Crystallised hydrochlorate of rosaniline has fallen from 250 or 300 francs to 25 and 30 francs. The blue, which was formerly sold at 500 francs, is now offered at 100 francs, and inferior qualities cost only 30 or 40 francs. These figures prove in a most convincing manner the enormous progress realized by the aniline colour industry since 1862."-(P. 104.)

Night Blue-The term night blue (bleu lumière) is given to a blue entirely free from violet, and which preserves its clear blue colour in artificial light. It is nothing more than a perfectly pure salt of triphenylrosaniline. To obtain it a good purified blue is taken, such as is given by the preceding process. After several washings with warm alcohol, the residue is reduced to fine powder, dissolved in boiling alcohol and the solution filtered. To the clear liquid is added ammonia, or, better still, an alcoholic solution of caustic soda; all the blue is precipitated in the state of base. When the ammoniacal or sodic alcohol solution is quite cold, the triphenylrosaniline is collected on a filter, washed once or twice with boiling water, and then treated with the necessary quantity of acid to form a salt. It will be seen that this operation is extremely simple and gives satisfactory results."(-P. 127.).

"A dyer, like all others of his craft at that time, was busily occupied experimenting with the aniline dyes. Amongst other things he tried a reaction which had been described by M. Lauth at the end of 1861, viz., that of aldehyd on a sulphuric solution of aniline red. In this reaction, a substance is produced which gives to solutions an extremely evanescent blue colour. M. Lauth had given up all idea of utilising this blue colour in practice; and M. Cherpin endeavoured to fix the same colour on silk or wool with similar want of success. His attempts, although fruitless, were incessantly renewed, exhausting his purse, but not his patience. One day, however, discouraged at the want of success attending some recent experiments on which he had founded great hopes, he was on the point of relinquishing the attempt at the conquest over this fugitive blue, when the idea struck him to confide his troubles to an old friend, a photographer. A trouble shared is a trouble halved,' says the proverb; Cherpin proceeded to test this saying, and experienced the reward of his perseverance and his confidence in the consolations of friendship. He found his photographic friend, and confided to him the history of all his hopes, his experiments, and his fruitless results.-'Fix the blue?' said his friend. 'Is that the only difficulty? Why it's the easiest thing in the world! Have you tried hyposu!phite of soda?'-Hyposulphite of soda? Mon Dieu, no! Do you think it will fix my colour?'-'Of course it will. Don't you know that hyposulphite of soda is the fixing agent par excellence, and that when we want to fix anything in photography, that is the substance we always employ?'

Happy is he who possesses faith! Cherpin tried hyposulphite of soda, and his joy and admiration of the chemical knowledge of his friend may be imagined when he saw his blue colour metamorphosed into a splendid green, this time perfectly stable. It is scarcely necessary for us to add, that the mode of action of hyposulphite of soda in this case is entirely different from its photographic action, and that it would be quite impossible to predict the one by knowing the other.

"This anecdote contains a moral. It shows, in our opinion, not the result of chance,-for that is common to all the world, for where is the discovery to which chance has not

more or less contributed?-but it shows the power of the will, the power of perseverance. Chance only favours two kinds of persons; those sufficiently instructed, or endowed with talents eminent enough, to observe it, to seize it, and to profit by it; and those who, by patience, perseverance, and the power of their will, force it in time to become useful to them."-—(P. 133.)

"The greatest uncertainty still exists as to the chemical constitution of aniline green. We are, however, justified in hoping that this will soon cease to be the case; aniline green is now a commercial substance, manufactured on a large scale, and is becoming more and more pure every day. After having presented to science a problem, without furnishing the data necessary for its resolution, manufacturing industry is working to fill up the gap, and everything leads us to anticipate a successful result." *—(P. 136.)

A final quotation from the reporter's introduction will form an appropriate termination to our notice of this record of some of the most striking gifts of science to civilisation which the world has ever witnessed:

"Thus, rosaniline has become the parent of a whole series of colours, and last of all of a green. The gamut of colouring matters derived from aniline is now complete; we have red, orange, yellow, green, blue, indigo, and violet.

"Are we not justified in saying that the manufacture of artificial colouring matters, in spite of the improvements of which it is yet capable, in spite of the discoveries which will yet enrich it, and scarcely ten years old, has emerged from the state of infancy, and become one of the most important industries of the age?"-(P. 100.)

THE material prosperity of this country owes much more to a constant process of delegislation than to the making of new laws. From corn-law repeal down almost to the present period, most of the beneficial work of Parliament has consisted in sweeping away the grievous fiscal laws imposed by the unwisdom of our forefathers upon body and mind-upon our food, raiment, the materials of our dwellings, and the means of knowledge. For more than a century wine has been subjected to a perverse fiscal contrivance, as if for the very purpose of vitiating the national taste, fostering gout and rheumatism, and in other ways spoiling human tissue. That for a hundred years this country should remain content to drink only coarse factitious wines, called port and sherry, will, we doubt not, prove a marvel to the next generation. Thanks to Mr. Gladstone, we may now, if we will, drink wine pure and good, and cheap; but our past blind fiscal arrangements regarding wine and the trading interests therewith interwoven, have enveloped the subject in a cloud of ignorance and prejudice, which only time and free discussion can disperse. To Mr. Denman the public ought to be much obliged for his vigorous onslaught upon the brandied, elderberried, unwholesome wines of Spain and Portugal, and for his ruthless exposure of the nefarious system of "applied chemistry" to the manufacture of so-called wines in force at Cette and Hamburgh. To Mr. Denman we owe the first introduction to the English market of the excellent Hungarian wines; and every one knows that to him we are indebted for If we cannot go naturalizing Greek wines in England. quite so far as Mr. Denman, whose interest as a wine merchant may be supposed unconsciously to stimulate somewhat his enthusiastic advocacy, we are quite prepared to say that he has conferred no inconsiderable boon upon the community by the enterprise and judgment which led to the introduction of Greek wines into this country. Having divested himself of prejudice against novel wines, let anyone, whose taste has got beyond the low stage of port and sherry, try some of the

"Dr. Quesneville informs us that since the publication of this report

MM. Girard and de Laire have obtained aniline green in the crystallised state, giving the most brilliant results in dyeing."

drier sort from Mr. Denman's list, and if they do not commend themselves to his palate by all the characteristics which should distinguish natural wine-homogeneity, delicate sub roughness, body, bouquet, and the power of conferring an ab imo pectore sense of well-being-the failure, we take it, ought not to be attributed to the wines. For the "sick and the sorry" the writer hereof-a physician--can testify to their nerve-nourishing, comforting, and invigorating virtues. We have referred to these wines as "novel," but -shade of Bacchus!-Greece is the classic soil of the vine. She gave to the wine-growing countries of Europe the cut. tings whence sprung their wide-spreading vineyards. Long ere the vine clad the slopes of the Rhine, the banks of the Garonne, or covered the Côte d'Or, it flourished on the volca nic soil of Greece. Free now from Turkish oppression, the alert commercial spirit of the Greeks may yet furnish us with unrivalled wine, such as won lavish praises from their antique poets, and so, in one respect at least, Greece may once again "teach the nations how to live."

CORRESPONDENCE.

Death from Carbolic Acid.

To the Editor of the CHEMICAL NEWS.

SIR,-Will you kindly allow us sufficient spice to say that the jury's verdict on the cause of Mr. Berger's death is evidently in error where it states that the inhalation of carbolic acid produced the lamentable result.

Our workmen frequently inhale carbolic acid in very large quantities during the process of its manufacture, and we have not known a single instance of ill-effect therefrom; and we can also state that it has been most extensively used in proper inhalers for several years in the cure of consumption, throat and chest diseases.

To us it is very evident that Mr. Berger died from the effects of accidentally drinking carbolic acid, and had any one been at hand to administer promptly a mixture of sweet oil and castor oil, his life might possibly have been saved.-We are, &c., F. C. CALVERT & Co.

Manchester.

High Chemical Formula.

To the Editor of the CHEMICAL NEWS. SIR-I have to correct an error committed by me in the course of the discussion at the last meeting of the Chemical Society.

Sir B. Brodie describes in his papers the ethylic ether of one of the wax-acids, and not the acetate of a wax-alcohol. By a strange, but intelligible oversight, I had confounded the one with the other. This mistake, which is here rectified, has, as will be obvious, no influence on the main questions which were before the Society.

When I have leisure, I may possibly set to work to prepare acetate of melissyl by the process sketched out by me.-I am, &c., J. ALFRED WANKLYN.

Notes on Ozone Development during April, May, and June, 1868.

To the Editor of the CHEMICAL NEWS. SIR,-I beg to forward the enclosed "Notes on Ozone Development" during the past three months:

Large Amounts.-April 2nd (aft.), 8th (morn.), 18th (aft.), 19th, 22nd (morn.), 23rd (morn.), 24th, 25th (aft.), 28th; May Ist (morn.), 5th (morn.), 10th (aft.), 11th, 17th (aft.), 22nd, 23rd, 24th (aft.), 29th (morn.), 31st; June 1st (aft.), 4th,

22nd. Small Amounts—April 13th (aft.), 15th (morn.), 16th; June 5th (morn.), 12th (morn.), 19th (aft.), 26th (morn.), 28th (morn.) No Ozone was found-April 9th (aft.), 10th (aft.), 11th, 12th, 17th (morn.), 20th (moru); June 29th (morn.). The greatest change in ozone development between any two consecutive days occurred between the 19th and 20th of April. Considerable changes also occurred between the 8th and 9th of April, the 4th and 5th of June, and the 18th and 19th of June.

Ozone development was extremely variable throughout the day on April 15th, 21st, 27th-30th; May 1st-5th; June 20th-22nd; and variable throughout the day on April 13th, 14th; May 24th, 25th; June 5th-8th, and 14th.-I am, &c., R. C. C. LIPPINCOTT, F.M.S. Highcliff House, Eastbourne, July 3rd, 1868.

Death from Carbolic Acid.

To the Editor of the CHEMICAL NEWS.

SIR, Allow me to add my opinion to Messrs. F. C. Calvert and Co.'s, that the jury's verdict on the cause of Mr. Berger's death is an error, and that the gentleman must have died from drinking carbolic acid, and not from inhaling it.

The only complaint that my assistants make, from constantly inhaling carbolic acid, is that of increased hunger.

I have been continually experimenting with carbolic acid for more than a year, and practising its inhalation upon my self, sometimes to intense inconvenience, and I can scarcely think it possible to cause death in that way.

It may be painful to the friends of this excellent gentleman, to be told that he must have drunk carbolic acid; yet the accuracy of this fact is important to the last degree, lest an insane prejudice should be created against the use of carbolic acid, just as its marvellous effects in consumptive cases, skin diseases, &c., are beginning to be generally known.

Neither new nor old remedial agents should be used indiscriminately. Excess can never be made the rule of life, and they who try excess must suffer.-1 am, &c.,

108 Dorset Street, E. C.

T. A. READWIN.

Cornish Minerals-Woodwardite.

To the Editor of the CHEMICAL NEWS. SIR,-As there will be no meeting of the Chemical Society for some months, will you allow me to say a few words in your columns with reference to the recent discussion on Woodwardite ?

I much regret my unavoidable absence from the meeting at which my "Mineralogical notices" were read. The speakers, who appear to have criticised somewhat adversely my views as to the rank of Woodwardite as a species, do not seem to have read my original paper on that subject. In the examination of this mineral, as well as of others which I have described, every possible precaution has been taken to secure an accurate result. Really distinct specimens have been analysed, their physical characters have been minutely ascertained and described, and their modes of occurrence have been studied, as far as practicable. As I have always taken, in describing new minerals, the very obvious precautions suggested by my critics, their criticism is inappropriate. -I am, &c.,

The Lizard, Cornwall, July 9th, 1868.

A. H. CHURCH.

MISCELLANEOUS.

Chemical Society at Newcastle-We are glad to hear that, at a meeting held on Monday evening last, at the Literary and Philosophical Institution, under the presidency

of Sir William Armstrong, K.C.B., it was decided to form a "Newcastle Chemical Society." Meetings are to be held monthly from October to March. Messrs. E. J. J. Browell, R. Calvert Clapham, H. B. Brady, A. Friere Marreco, J. W. Swan, J. Pattinson, B. S. Proctor, W. H. Richardson, and Dr. Lunge, were constituted a committee to make the necessary arrangements.

Another Explosion of Nitroglycerine.-We have received accounts of a disastrous explosion caused by this dangerous compound at Quenast, in Belgium. About 1,800 kilos were being conveyed in a waggon to the quarries belonging to M. Zaman, where it was to be used for blasting purposes, but while it was being removed from the waggon a tremendous explosion occurred. Ten persons were killed instantaneously. A large store close by was quite destroyed, and the houses, trees, and fields within an area of 500 yards were devastated. Fortunately the quarrymen were not at work at the time, or the explosion would have been a still greater calamity, there being about 700 men employed in the works.

record the death of Professor Matteucci on Friday morning Death of Professor Matteucci.The Italian papers last, at Florence, after a short illness. The deceased was an Italian senator and Minister of Public Instruction, in which capacity he was very active in promoting the extension of education. But he was better known as a man of science than as a politician or a minister. He obtained, in 1844, the prizes of the French Academy of Sciences and the Copley Medal of the Royal Society for his investigations in electro-physiology. His "Lectures on Physics" passed through four editions. He published also A Manual of Telegraphy," "A Treatise on Electro-physiological Phenomena," "Elements of Electricity as applied to the Arts," and "Lectures on the Physico-chemical Phenomena of Living Bodies," which has been translated into English and

French.

Behaviour of Albumen and Fibrin în Áir free from Dust.-Dr. Gunning relates a remarkable instance of the different behaviour of these two substances; in the year 1862 he repeated some of the well known experiments of Pasteur concerning the behaviour of some organic substances prone to rapid decomposition, while kept in air free from dust, and so that dust can have no access to the substances under trial. In the above-named year Dr. G. took fibrin obtained from blood by agitating it with small twigs and washing it with water; it was then placed in botles (ordinary large water bottles of from 2 to 3 litres cubic capacity) covered with water, while afterwards, in the neck of the bottle, a piece of cotton wool was placed; a rapid current of steam was now passed into the bottle through a glass tube which reached to the bottom of the bottle, and coninued for about 20 minutes; the tube was carefully raised while steam was yet passing and without disturbing the tuft of cotton immediately after the neck and mouth of the bottle was covered over with a piece of filtering paper, and the bottle left to itself. At the end of 1867, the water standing over the fibrin had not even become turbid, and the fibrin itself was unaltered. A similar experiment, made with albumen (obtained from eggs by diluting the white of eggs with water, filtration, coagulation by heat, and addition of a few drops of acetic acid, and careful washing of the coagulum previous to being placed in a bottle, in a similar manner as just described for fibrin), proves also, at the end of the year 1867, that under the same circumstances albumen always undergoes a change, but one essentially different from that which it undergoes when exposed to ordinary air. No infusoria, or mouldiness is seen; the albumen becomes slowly dissolved and, provided the bottle is not exposed to light, the resulting liquid is hardly more than just yellowish coloured, but milky; no sulphuretted hydrogen is given off, but the sulphur originally contained in the albumen is found as sulphuric acid. The liquid contains, moreover, ammonia, butyric and valerianic acids; on evaporation it yields a

substance which represents, in bulk and weight, only a small portion of the albumen originally submitted to the experiment.

Utilisation of Sewage.-Some experiments just completed at Tottenham seem likely to throw some light on this question. A new mixture of several chemical ingredients introduced by Mr. Sillar has been tried on a large scale, and with considerable success, the impurities being precipitated more rapidly than by either the alum or the lime process. The proportion of the organic matter carried down is very large, and 85 per cent of the ammonia is fixed. At Tottenham a 5000 gallon tank was filled and precipitated eight times in succession, the average time occupied being but little more than 20 minutes. The analysis of the supernatant water shows that it contains but 2 grains per gallon more organic water than the Tottenham water supply, and of its saline constituents by far the larger proportion is common salt-the refuse of a manufactory. The mud has since being dried, and weighs about 8 cwt. It contains enough ammonia to make it in all probability a remarkable article; and its value is expected to pay all expenses. 40,000 gallons were afterwards purifiled in a larger tank, the time occupied, including filling, was less than an hour; the water was almost free from either taste or smell. Some larger experiments are about to be tried under the direction of Mr. Wigner in another

town.

Chemical Promotions.-There is some stir in the chemical world apropos of existing vacancies and probable promotions. Unfortunately the number of remunerative offices which can be held by scientific chemists in this country is small, and the emoluments, for the most part, are absurdly insufficient. That accomplished chemical pluralist, Dr. Frankland, having resigned one of the least lucrative of his positions, Dr. Odling will succeed himwhether wholly or in part, seems not quite clear. Dr. Odling will, we believe, associate with himself a co-lecturer at St. Bartholomew's Hospital; and this will probably create a vacancy in the chemical chair of another metropolitan medical school. Dr. Lyon Playfair will also, it is understood, vacate the chemical chair in the University of Edinburgh, in the case of his election to represent the University in Parliament. It is expected that he will be succeeded by Dr. Anderson, Professor of Chemistry in the University of Glasgow.-British Medical Journal.

[The above paragraph is not quite correct. Dr. Odling has been appointed Fullerian Professor of Chemistry at the Royal Institution; not, however, vice Dr. Frankland, resigned, but in the place of the late Professor Faraday. Dr. Odling's co-lecturer at St. Bartholomew's Hospital will be Dr. Matthiessen; and the vacancy which this will occasion at St. Mary's will probably be filled up by Dr. Russell]

Department of Science and Art.-In our number for May 3rd, 1867 (Am. Repr., July, 1867, page 41), we published a letter from a correspondent announcing that the Council of Education had offered to make payments to science teachers to enable them to visit the Paris Exhibi tion, and for any reports or useful suggestions which they might make (in respect to their duties or teaching) derived from the study of the Exhibition, and offered further sums of £20, £15, and £10 for the best of such reports referring to instruction in science. We now learn that on examining the reports sent in, it appears that the best do not fulfil the conditions of the minute. The Lords of the Science and Art Department have therefore made special grauts as follows, viz., to Mr. Shore of Burnley, and Mr. E. A. Davidson of London, £15 each; and to Mr. Mayer of Glasgow, Dr. Wilson of Nottingham, Rev. B. W. Gibsone of London, and Mr. Bolam of Leith, £10 each. One section of Mr. Gibsone's prize report has already appeared in the CHEMICAL NEWS.

The Atmosphere of the Metropolitan Railway. -The attention of whatever authorities may exist for the control and direction of railways must be earnestly invoked to the frightful state of the atmosphere-we beg pardon for misusing the term-in the Metropolitan Railway tunnels. Several persons died in these shamefully neglected passages during last summer, and, if one is to look at the present state of the line, they died in vain. Something was done or said to have been done, and scientific witnesses of great distinction distinguished themselves by reassuring the public mind as to the salubrity of the tunnels. The company produced their own servants in such blooming states of health that some folks were expected to reside permanently in the carriages "for the benefit of the air." Still, however, in the worst part of the railway, i.e. from King's Cross to Baker Street, the heat is often so great that perspiration streams over travellers' faces, and the effect of the want of ventilation is so painful that scores drag themselves faintly up the steps at the stations. If there is no reason why the atmosphere of a coal-pit should be maintained in London, the tunnels ought to be properly ventilated. Two or three shafts placed after the manner of mines with furnaces at their feet would serve the purpose. It is not needful to place such shafts immediately over the arch and in the middle of the highway, but some wisely-selected spot would suit on that "surplus property," which is said to be worth a million, and to be in the hands of the company. We do not assert that the company actually possesses so vast an estate as this sum of a million would imply, but there can be no doubt,-1, that it can afford to ventilate the line: 2, that if Parliamentary authority has enabled it by compulsory purchase to obtain so enormous an estate, the sooner that matter is inquired into the better.Athenæum.

Ozone. The Journal of the Franklin Institute for April says that a youthful physicist of its acquaintance, who has one of those collections of chemicals and apparatus known as Crew's Laboratories, while trying the developement of ozone by the action of a heated glass rod upon a mixture of air and ether, varied the experiment by substituting oxygen for air and a glass tube for a rod. Under these conditions, a tremendous detonation was the result of the introduction of the heated tube into the mixture. Supposing that the glass might have been too hot, he repeated the experiment, but again an explosion followed, although the tube was not suffi ciently hot to burn the closed hand when drawn through it. A glass rod was then tried, but although at a low red heat, it produced no such result. The explanation is obvious. The position of mixed gas and vapour inside of the tube, being confined, was so completely acted upon that ozone in sufficient purity and bulk to ignite the vapour or mixture was produced; while in the case of the rod, that part of the oxygen converted into ozone at each instant was too rapidly diffused and diluted for such a result.

CONTEMPORARY SCIENTIFIC PRESS.

[Under this heading it is intended to give the titles of all the chemical papers which are published in the principal scientific periodicals of the Continent. Articles which are merely reprints or abstracts of papers already noticed will be omitted. Abstracts of the more important papers here announced will appear in future numbers of the "CHEMICAL NEWS."]

Comptes Rendus. March 16, 1863.

PAYEN: "A Method for Extracting Cellulose in an unaltered condition from the Epidermis of Plants."-A. STRECKER: On a new mode of Formation of Organic Sulpho-acids. On the Transformation of Uric Acid into Glycocol."-C. FRIEDEL and A. LADENBURG: "On an Orychloride of Silicium."—A. BECHAMP: "On the Reduction of Nitrates and Sulphates in certain Fermentations."-MAUMENE: "Note on the Composition of the Potash obtained from Suint, apropos of Chevreul's paper' Õn Manures, &c.”

March 23, 1868.

Annalen der Chemie und Pharmacie. March, 1868.

A. BUTLEROW and M. OSSOKIN: "On the Synthesis of Alcohols, and on the Chemical Constitution of Ethylene."-A. BUTLEROW: "On some Hydrocarbons of the Series Cnll2n."-A. POPOFF: "On the Isomerism of the Ketones. On Ethyldimethylcarbinol.”—R. OTTO: "On some Derivatives of Benzol and Toluol."-H. LIMPRICHT and H. SCHWANEKT: On some Compounds of the Toluol Series."- R. OTTO: "Note on the Action of Nascent Hydrogen on Benzoglycolic Acid."-A. W. HOFMANN: On the Preparation of Methylic Aldehyde."-E. ERLENMEYER: "On the Dicarbonic Acids obtained from Chloride of Ethylidene.”—A. FROEHDE: "Note on a new Reaction of Albuminoid Substances."

Annales de Chimie et de Physique. February, 1868.

A. HOUZEAU: "On the Estimation of Minute Quantities of Peroride of Hydrogen."-BERTHELOT: On some Chemical Apparatus: (1) An Improved Gas Lump; (2) Pipette for Trnsferring Gases; (3) An Apparatus for Decomposing Formic Acid; (4) An Apparatus for the Synthesis of Acetylene. A new Thermometer for indicating Temperatures above the Boiling Point of Mercury." THIERCELIN: On the Nitrate of Soda Deposits of the Province of Tarapaca, Peru."

P. SCHUTZENBERGER: "On a New Platinum Compound."-TERREIL: "On the Analysis of Minerals: Action of Ammoniacal Salts on Native Carbonates."-H. DEBRAY; Researches on the Combinations of Molybdic Acid with Phosphoric Acid."-A. HOUZEAU: "Answer to L. Sauvage's Remarks on the Author's Papers respect. ing the Decomposition of Iodide of Potassium by Sulphuric Acid."

Poggendorf's Annalen der Physik. No. 2. 1868.

P. GROTH: "Contributions to the Knowledge of the Perchlorates and Permanganates."-A. FOSTER: An Account of some Methods of Preparing Phosphorescent Compounds.” - W. MULLER : "On the Method of Preparing and Properties of Soft Yellow Sulphur."

Bulletin de la Société Chimique de Paris. January, 1868. A. GAUTIER: "On Acetonitrile and Propionitrile."-BERTHELOT 'On Oxysulphide of Carbon.”—A General Method of Reducing and Saturating Organic Compounds with Hydrogen."-THIERCELIN: On the Nitrate of Soda Deposits of Peru."-E. BOURGOIN : “A General Theory of the Electrolysis of Organic Acids and their Salts. -On the Electrolysis of Formic Acid."-P. BERARD: "Note on Cananba Wao."-SCHEURER-KESTNER and ROSENSTIEHL: "Note on the Composition of the Residues left after roasting Iron Pyrites." February, 1868.

THIERCELIN: "On the Nitrate of Soda Deposits of Peru." LAUTH: "On the same Subject."- CLOEZ: On the same Subject." E. BOURGOIN: "Researches on the Electrolysis of Organic Acids and their Salts."-JUNGFLEISCH: "Researches on a Second Series of Chlorinated Derivatives of Benzine."-G TISSANDIER: "Analysis of the Water of the Mineral Spring of Villa Salice, near Voghera, Piedmont." DEBRAY: "Researches on Dissociation."-E. BOURGOIN : "On the Electrolysis of Camphoric Acid."-BERTHELOT: "A General Method for Reducing and Saturating Organic Compounds with Hydrogen. On the Formation of Acetylene in incomplete Combus tions by Means of the Voltaic Battery.--On some Thermo-chemical Phenomena which accompany the Reaction of Hydriodic Acid on Organic Matter-On some General Conditions which affect Chemical Reactions."

Journal für Praktische Chemie. March, 1868. RITTHAUSEN: "On Vegetable Casein or Legumin."-R. FRESE NIUS: On the Composition and Properties of the Rothhole (par

tially Carbonised Wood), manufactured by the Chemical Products Company at Mayence."-G. STADELER: On the Constitution of Sulphophenylic Acid-Note on Anisic Aldehyde.-On the Preparation of Permanganate of Potash.-A. EULENBURG: "On the Formation of Sugar in the Liver."-K. VON HAUER: "On the Relative Solubility of Isomorphous Salts and Mixtures of the same."-K. HAUSHOFER: On the Decomposition of Granite by Water."—R. HERMANN: "On the Composition of the Columbites, and on the Preparation of the Acids of Tantalum, Niobium, and Ilmenium from that Mineral."-F. ULLIK: "On some Compounds of Tungstic Acid."-F. VON KOBELL: "On Typical and Empirical Formula of Mineralogy."-F. REINDEL: "On Hutchett's Brown, and on a Triferrocyanide of Sodium and Potassium."-W. STEIN: On the Manufacture of Ultramarine Paper, and on the Action of Neutral Alum on Ultramarine and Hyposulphite of Soda.” — E. MULDER: "On Sulphocarbamic Acid and some of its Salts."

Comptes Rendus. April 13, 1868.

H. DEBRAY: "On the Formula of Molybdic Acid, and on the Equivalent of Molybdenum.”—L. TROOST and P. HAUTEFEUILLE: “On the Production of Paracyanogen, and on its Transformation into Cyanogen."-H. CARON: "On the Use of Fluoride of Calcium in Smelting Iron Ores containing Phosphorus."-P. SCHUTZENBERGER : "On the Crystallisation of Sulphur.—On some Chemical Reactions CHEVRIER: "On the Amides of Sulphoxyphosphoric Acid," which give rise to the Formation of Oxychloride of Carbon.”

April 20, 1868.

A. WURTZ: "On the Identity of Artificial Nourine with that obtained from the Brain."-L. TROOST and P. HAUTEFEUILLE: "On the Production of Paracyanogen, and on its Transformation into Cyanogen."-JEANNEL: On the Preparation of the Salts of Sesquioxide of Iron and on Oxychloride of Iron."-F. JEAN; Note on the Manufacture of Phosphate of Soda and of Fluoride of Sodium.” -P. ScuUTZENBERGER : On a New Acetute of Chromium."-C. FRIEDEL and A. LADENBURG: “On some Derivatives of the Radical Silico-Allyl."

April 27, 1868.

SAVARY: "On a Sulphur, Carbon, and Salt Water Battery."-F P. LE ROUX: "On the Introduction of a Cylinder of Magnesia into the Voltaic Are for the purpose of increasing and steadying the Light produced."-H. CARON: "On the Preparation of Magnesia to be used for the Manufacture of Refractory Articles."

Annales des Mines. No. 5. 1867.

N. KOKSCHAROW: "On the Decolouration of the Topos."-GorPERT: "On some Minerals which may be found associated with the Diamond."-CZECH: "On a Specimen of Crystallised Graphite.". NAUMANN: "On the Pyro-Electricity of Quartz."-STRENG: “On the Composition of certain Silicates."-Fucus: "On the Specifie Gravity of certain_Silicates."-GUTHE: "On the Composition of Garnet." J. A. MICHAELSON: "On the Composition of Hornblende."-HERMANN: "On Wöhlerite, Eschynite, and Euxenite."HAIDINGER: "Analysis of Meteoric Iron from Dakotah, India." BORICHY: 66 Analysis of Meteoric Iron from Carthage, North America."-REICHARDT: "On Kainite from Stassfurt, Prussia."BREITHAUPT: "On the Presence of Magnesia in Arragonite."

Annales de Chimie et de Physique. March, 1868.

J. L. SORET: "Researches on the Density of Ozone."-J. B. BousSINGAULT: "On the Functions of Leaves."

Archives des Sciences. April 15, 1868.

H. WILD: "On the Absorption of Light by Dry and Mvist Air.” Bulletin de la Société Chimique de Paris. March, 1868. BERTHELOT: "A General Method of Reducing and Saturating Organic Compounds with Hydrogen."-LECOQ DE BOISBAUDEAN: "On the Supersaturation of Šaline Solutions."

Dingler's Polytechnisches Journal. April, 1868. "P. VON TUNNER: "On Oudry's Method of Depositing Copper on Iron by Voltaic Electricity."-REICHERT: "On the Manufacture of Magnesium from Carnalite."-C. NOLLNER : "On a Compound of Bichloride of Tin and Chloride of Sodium. On an Explosion of Hydrogen in a Vacuum Pan at the Kuttenberg Sugar Refinery."

Journal für Praktische Chemie. March, 1868.

H. RITTHAUSEN: "On Vegetable Casein or Legumin. On the Products of the Decomposition of the Legumin and the Protein Compounds of the Lupine and Almond by Boiling with Sulphuric Acid. On Glutanic Acid, a Product of the Decomposition of Glutanic Acid by Nitrous Acid."