manufacturers who have transported nitroglycerine in large quantities, and on the other hand, that those who manufacture and use nitroglycerine outside of the patent greatly outnumber the operators under the patent. The second point of coincidence suggests that Nobel's nitroglycerine undergoes a change after its manufacture.

actual

change had been going on in one or more of the pack-
ages for a long time, and the heat thus generated was
confined and concentrated by reason of the non-con-
ducting plaster, until the exploding temperature was
reached. And it is probable enough that the jolting of
the car brought on the explosion somewhat prematurely.
If the boxes had been left quietly at the Iron Mountain
the explosion might have been delayed a week or a
month.
This article has now grown beyond the limits set for
it, and we are obliged reluctantly and abruptly to close
it.
The Sun as a Glass-Stainer,

But there are those, and we are among them, who believe they have a reasonable clew to all the mystery of nitroglycerine; this c'ew they find in its chemical nature. Nitroglycerine is a sort of gunpowder, in which three atoms of the monatomic radical, nitryl (NO) serves as the nitre, and the glycerin residue (CH.O3) as the combustible part. The radical NO, is a remarkably concentrated and powerful oxidizer, and thus GLASS is commonly supposed to be one of the most gives to the organic compounds in which it has a unchangeable of chemical compounds, and that its single place a character of instability and danger. In pure been shown by Mr. T. Gaffield, of Boston, that nearly weak point is its frangibility. It has, however, recently nitroglycerine C.H.(NO2)30, the oxygen is brought very near to its antagonistic elements, and needs but all kinds of window glass, at least, become altered in little to provoke a contest which may terminate in color, and that the change is not superficial but extends an instant or be prolonged indefinitely; but the conwherever the light penetrates. Some samples show a test once begun it is irrepressible, unless by some out- change in a few hours of exposure, while others hold side interference. The possible products of a slow in-out for years. The tints seem to be limited to purples ternal oxidation are numerous, and it is pretty certain and yellows, the purples rupning from pale lavender into that some of these products are more unstable than the the lilac, mulberry, flesh, amethyst, rose, violet, pink, nitroglycerine itself. The oxdaition is of course acand deep purple, and the yellows through all shades of companied by heat, and if this heat be retained the has found that glass which has been stained by sunlight lemon to the brightest gold color. M. Pelouse rate of oxidation will be increased, and the exploding temperature will at last be reached. In short, here is light is bleached by an exposure to a red heat, and that the successive coloring and bleaching may be carried on a case of spontaneous combustion, which differs from ordinary cases in the fact that NO, takes the place of air. indefinitely. The facts in the case are certainly curious, Thus on theoretical grounds the character of nitroglyce- and photographers and greenhouse proprietors have rine may be predicted. opportunities to learn that they are of practical imporAll such considerations of theory are confirmed by tance; indeed it is not at all improbable that they may lead to some useful improvements in the arts. Indeed, before the theory was experience. Mr. possible we had the facts. Gaffield has given a hint, by making pretty designs in Sombrero, de Vrij, Frankland, and other investigators of nitroglycerine, more the sensitive glass, following the method of photothan twenty years ago, exhibited all its dangerous graphic printing, and perhaps has thus inaugurated a properties. That it is liable to a dangerously spontane-retical interest, involving such questions as what are new art of photography. The subject is of great theoous change is susceptible of simple and complete demon- the chemical reactions which accompany the changes, stration, and no one who will witness it without pre- and what is the character of the movements in the injudice can fail to find a satisfactory explanation of the terchange of atoms in dry solids like glass. Although mystery of nitroglycerine. There are two facts which it is especially desirable Mr. Gaffield was not the first to discover the coloring of to remember 1st. The spontaneous change once be- glass by light, he has so diligently and so laboriously gun in simple nitroglycerine will inevitably terminate explored the subject, that it fairly belongs to him, and in explosion, if the heat of oxidation be confined. 2d. his name will be identified with it for all time. He has Changed or impure nitroglycerine will explode at lower used a considerable part of his leisure for the past six temperatures and with less force of concussion than years in the investigation, and with unflagging interest pure nitroglycerine. Yet it has been persistently dehe is st ll planning and carrying on experiments. We clared that commercial nitroglycerine is not at all lia- spection of his samples of glass and of photographs, to are able, from a recent interview with him and an inble to spontaneous change, that it will not explode by a heat of less than 360 deg. Fahr., and only by an extra-testify to his intelligent industry and enthusiasm in the ordinary concussion. Pretty successful attempts were made in nearly all the cases of disasters which were judicially investigated to divert attention from the dangerous character of nitroglycerine by suggestions of anything else which was possible. It was represented that the Greenwich street explosion occurred because a tailor rather than an engineer had charge of the box, although neither the poor tailor nor any other person had opened it for months when it exploded; that the explosion at Aspinwall originated with percussion caps supposed to be on board the vessel destroyed, and that the Hudson Co. explosion was caused by a workman thrusting a red-hot iron into the can, or by the pressure of vapor in the can generating the exploding heat.

The application of the chemical theory to the Ohio explosion is simple and satisfactory: The spontaneous

m: er.

Shoe Blacking.

BLACKING, like cold punch, seems to be made up of incompatibles. Punch calls for fiery whiskey and ice (hot and cold); and sugar and lemon (sweet and sour). The receipts for blacking prescribe boneblack, composed of bone ash, say five parts (white), and carbon one part (black); oil of vitriol (sour), and molasses (sweet); and finally oil and water. Yet each of these ingredients has its specific and important office. The boneblack furnishes the blackness and the powder (carbonate and phosphate of lime), which, with the aid of the oil of vitriol, blows up, disintegrates, and pulverizes the tough, bony structure; the molasses provides for the shining, and the oil and water temper and preserve the consistercy needed for use. Thus the heterogeneous elements

Kindly harmonize with each other and unite in producingents with anti-hydro matter, so as to render the game, and the igniting

the happy result. It is worthy of remark that there is no free sulphuric acid in blacking, and that the sulphuric id of black ng is innocent of the crime with which it ire oa hed, of injuring the leather. The Sulphuric acid wholly combines with the lime of the boneblack, and tus, in effect, is put out of existence. Superphosphate, of line is, however, set tree in the chemical reaction, and proof is in order of any effect thereby, good or bad, ou the leather.

Butter from Milk.

surfaces and matches prepared therewith, wet and damp proof.

24. The manufacture of friction-igniting chemicals and ingredients for safety matches and their igniting surfaces, with the anti-hydro inatter or Compound herein mentioned, and applying the sene directly to or upon the natural surface of the material of boxes, match-containers, or match

igniters of metal, china, stone, carthenware, or other similar materials, Sd. The manufacture of other match igniting chemicals, with the antihydro matter or compound herein mentioned, and applying the same to matches:

89,707.-PREPARING RESIN SIZE FOR USE IN PAPER-MAKING. Thomas Gray, of London, England. Patented in France June 30, 1868.

I claim 1st. The improved process for making size, by first bleaching the resin in a solution of warm water and salt of soda, or other alkaline salt, and mixing the same with & solution of chloride of sodium, under the conditions substantially as and for the purpose specifled.

2d. Size prepared by the herein described process as a new article of manufacture, substantially as and for the purpose specined. 83,730.-APPARATUS FOR CARBURETING AIR.-Joseph Richard, assignor to himself and G. W. Baker, New York City. Antedated Oct. 28, 1868.

I claim 1st. The arrangements and combination of the inclined shelves e, el, c2, 3, and absorbing sheets, i, 11, 12, 13, the upper edges of which

dip into the troughs, d, di, d2, da, substantially as and for the purpose described.

A PROBLEM, Something like that of how to extract blood from turnips, has, for several inonths past, been puzzling the chemical wits of the country. It is no less than how to produce one pound of butter out of a pint of milk and a chemical. That the problem is solved was put forth with considerable persistence by circulars and advertisements in newspapers, and oppor-e, el, 2, 3, absorbing shots, i, 11, 12, 13, and troughs, d, di, dz, d3, contunities have been abundant for procuring information CD an investment of one dollar and upward in the chemical or in a receipt. "The Patent Butter Associa-83,733.-RECOVERING WASTE ALKALIES FROM PAPER-STOCK

24. The vertically-adjustable rods, g, g', in combination with the shelves
structe i are operating substantially as and for the purpose set forth.
34. The vertically-adjustable rod, g, în combination with the sheets, i, 12,
and troughs, d, d2, substantially as and for the purpose described.

AND OTHER FIBRES.-Carl Dietrich Julius Seitz, Bury,
England, assignor to himself and Charles Edmund Bailliere,
New York City.

I claim 1st. The general system or mode of treating the waste liquors resulting from the preparation of bamboo, cane, Esparto, grass, alt straw, or other similar fibrous substance, as and for the purpose herein set

forth.

tion" of this city, or some needy young man under
that style, advertised the chemical in the form of a
powder, at one dollar per box. The sceptical and face-
tions Scientific American, suggested to a correspondent
that the chemical to be added to the pint of milk was
probably a pound of butter; thus bringing the case
to the category of practical conundrums somewhat
akin to that on ram- (a sort of butter) and rod (a sort
of Equoi). The American Agriculturist indignantly
pronounces the whole affair a brazen swindle, and de- |
clares that the powder of the "Patent Butter Associa-
tion" resembles "cooking soda," and is of none ellect
in the direction of butter-making. Neither of our re-
Epected contemporaries, however, do exact justice in the
premises. The chemical employed is a substance which
will curdle milk, . ., coagulate the casein of milk, and
is perfected by adding to it a little yellow coloring
matter and a little salt. The best known coagulator
is rennet, and a sample of the chemical which we have
Sn was bi-sulphite of soda, and another, alum mixed
with a vegetable acid. A sample of the "butter"
which was brought to our office had a mushy consis-position, substantially as described and specified.
tence, and was a poor imitation of anything good to
eat. As milk contains only about three per cent
Casein, the "butter" of the "Butter Association" is
nearly all water.

2d. The system or mode of mixing the concentrated waste liquors with
a certain proportion of soda (caustic soda, soda-ash, recovered ash, or sul
phate of soda, and with quicklime, in the manner herein set forth.
83,737.-COMPOUND FOR DESTROYING INSECTS ON PLANTS,
TREES, ETC.-George W. Spots, Jacksonville, Ill.

I claim the composition, substantially as and for the purpose above set forth. 83,743.-CHARGING GASES WITH VAPORS OF HYDRO-CARY CON LIQUID.-Cyrus M. Williams, assignor to Henri L. Stu art, New York City.

I claim, 1st, a gas-holder, in which is suspended or retained any stable absorbent or capillary material, saturated with hydro-carbon liquid through which air or gases are passed for carbureting.

Patent

i.

Claims for Inventions in the Chemical
Arts.

18

Very little information about the nature of the new inventions can be had by a study of these patent claims. I some of the claimants rely believe that words were invented to cor ideas? Issued November 3. 83,589-EXTRACTING SACCHARINE MATTERS PROM MALT.William Anheuser, St. Louis, Mo. Antedated October 28,

1868.

Isan, 1st. The process of forcing a direct current of steam, water, or compressed air into a tight compartment, containing the malt, for the purpose of pressing the saccharine juice from the malt.

2. The application of a suction apparatas to secure a ready issue of the Raccharine liquor, either separate or in combination with the device specified in the first claim.

83,615.-COMPOUND FOR KILLING INSECTS ON TREES.-H. D. Flower, Chicago, Ill.

1 ch... the ingredients herein named, compounded and applied substantially as and for the purpose set forth.

83,643.-MANUFACTURE OF OXYD OF ZINC FROM SULPHURETTED ORES.-David Lees, Blair county, Pa.

I claim the application of a hot blast, substantially in the manner and by the process above described, to the manufacture of oxyd of zinc, whereby the oxyd is always formed in an oxydizing atmosphere, and at a temperature sufficiently elevated to decompose all injurious products. 83,683.-COMPOSITION FOR THE MANUFACTURE OF SAFETY AND OTHER FRICTION MATCHES.-William Austin, London England.

I calm ist. The manufacture of match-igniting chemicals and ingredi

20. I claim a carbureting chamber, placed in the gas-holder tank, arranged to receive and distribute hydro-carbon liquid, through which air and gases are forced, for the purpose set forth. 83,758.-PROCESS OF PRESERVING TIMBER FROM. DECAY.Charles Brown, Albemarle county, Va. material or materials substantially as described. 83,786.-PROCESS OF RECOVERING THE MATERIALS OF WORNOUT PRINTERS' ROLLERS.-Joseph H. Osgood, Peabody,

Ichim preserving or lapidifying "wood, in the manner and with the

Mass.

I claim the process for utilizing the ingredients of discarded roller.om

NEW PUBLICATIONS.

A PRACTICAL TREATISE ON MST:LURGY: Adapted from the last Ger-
man edition of Prof. Kerl's Metallurgy. By Wm. Crookes, F.R.S.,
etc., and Ernst Rohrig, Ph.D, M.D. In two volumes-Vol. 1. Lead,
Silver. Zinc, Cadmium, Tin, Mercury, Bismuth, Antimony, Nickel,
Arsenic, Gold, Platinum, Sulphur With 207 Wood Engravings,
Pp. 724
New York: J.
$9. London: Longinans, Green & Co.
Wiley & Son.
This seems in all respects an admirable work, and will, without doubt,
Kerl's
take a high and permanent place in technological literature.
treatise has for a long time been the highest authority with metallur-
gists who were acquainted with the German language, and except for
its great bulk would have before this been translated into English. The
present work, however, is more valuable than any simple translation
could be. The English authors have judiciously omitted that consider-
able part of the text of the German which pertains to assaying, and
have supplied its place with descriptions of new processes for the ex-
traction of metals.

THE VARIATION OF ANIMALS AND PLANTS UNDER DOMESTICATION. By
Charles Darwin, M.A., F.R.S., etc. Authorized edition, with a Pre-
face, by Prof. Asa Gray. In two volumes. With Illustrations. Pp.
494. 568. $3 per vol. New York: Orange Judd & Co..
This is a work which will interest and profit all classes of readers; and
any one who reads it will find that it is one of the few books which it is
a duty to carefully preserve for future use. It is a nine of facts and
suggestions pertaining to natural history, so curious, important and
novel, that compilers will not exhaust it forcenturies to come. Darwin's
fame has heretofore rested mainly on his brilliant theory of develop
ment by natural selection; but this work shows him to be one of the
most industrious and skilful observers and collators of facts of modern
times. The work is provided with an index, filling fifty-two closely
printed pages.

A SYSTEM OF INSTRUCTION IN THE PRACTICAL USE OF THE BLOWPIPE:
being a Graduated Course of Analysis for the Use of students and all

348

American Supplement.

Dec., 1909.

The

closet commode is a very proper thing to have in every house. pamphlet will do goed in making more public the useful, sisorbing and deodorizing power of dry earth.

Second nuisances of privies when the use of water is impracticable. The subthose engaged in the examination of Metallic combinations. Edition. With an sppendix and a copious index, by G. W. Plymp-ject is evidently a lobby with Mr. Waring, and he thinks an earth ton, A. M., Professor of Physical Scictice of the Polytechnic InstituNew York: D. Van Nostrand. tion, Brooklyn. Pp 298. $2. Trus is a compilation from the German of Seher ver and Plattner, and the title indicates what it was intended for. The first edition was chosen for a text-book by Professor Plympton and other teachers. This second edition has been carefully revised, corrected, and enlarged, and is now without doubt an accurate presentation and exposition of the uses of the Blowpipe,

MICROSCOPIC EXAMINATIONS OF BLOOD; AND VEGETATIONS FOUND IN
iry. M.D.
VARIOLA, VACCINA, AND TreHo FaVKR. By J. II. Salisb
Pp 65. roo. New York: W. A. Townsend & Adams.
DR. SALISBURY has eindied the subject con amore for over eight
years, and has made more than thirty-five thousand individual ex-
aminations of blood with the microscope. This book, which is based up-
on so much labor, plainly sets forth his methods and his conclusions.
Appears to be a very important original contribution to Pathology.
Physiology and probably to Practical Medicine. Every physician and
mi roscopist ought to be interested in it. The work is suitably illus-
trated.

LIGHT: Its Influence on Life and Health.
D. C. L, Oxon. (Hon.), &c., &c. Pp. 200
Townsend & Adains.

It

By FORBES WINSLOW, M.D.,
$1.75. New York: W. A.

The object of this book is to show the Importance of Light as a
The
hygienic agent, and the author succeeds well in his argument.
sun is proved to be useful to mankind in ways that many do not dream
of. The book is written in a popular style, and abounds in curious and
entertaining facts. The anthor is evidently poorly up in chemistry, but
the reader will not thereby be seriously led astray.

A TREATISE ON OPTICS: Or Light and Sight Theoretically and Practi-
cally treated with the Application to Fine Arts and Industrial Pur-
suits. By E. NUGENT, CE. With one hundred and fifty Illustrations.
Pp. 235. $2.00. New York: D. Van Nostrand.

THE Author says in his preface: "It is hoped that this treatise will
be found useful, not only to artists, but to mechanics and artisans gen-
erally As a text-book for schools and colleges for both sexe", such a
treatise, coming within the means of all, has long been a desideratum."
Arid agata: "The painter and house-decorator the milliner and dress-
moker, the taller and cutfitter, will, one and all, find the principles of
color and their harmonious relation clearly explained; while the
scu iptor, the builder, the stone-cutter, the mason, the draughtsman,
the architect, the engineer--in short, all persons who may be engaged
in aray department of human industry-will find the work. It is hoped,
worth y of careful study." And there is more of the same sort. Chapter I
starts off thus: "Opties is the science which treats of vision, or seeing,
and of the nature and properties of light-the changes which it (!) un-
dergoes, in its qualities or direction when." &c. On opening the book
at randong we learned (page 208) that "the spirit level is an optical
Instrument nsed by survivors, engineers, &c," meaning. however, the
So also the theodolite,
spirl level wich is provided with a telescope.
quadrant, end transit instrument are all described as ostial instruments. -
If we believed in Nugent we should consider a locomotive an optical in-
strument, for the parabolic reflector is an adjunct about as important to
it as the telescope is to surveying Instruments. Mr. Nugent used his
Resors pretty freely, and of course he would have made a better hook
the hail relled entirely on them, for in his hands they are mightier
thanthe pen. When he is moved to get up another book on Optics he
Aboula aske a clean thing of it, as when we snip off a doz's tail close fo
his ears, ad extract from any one of a score of good school books on
Natural Philosphy whatever is said about Optics from A to Z inclusive.
A man with fuzz of intellect should never be allowed to use his
own pen on a subject so venesble. •

With nu

How CROPS GROW: A Treatise on the Chemical Composition, Structure
and Life of the Plant. For all Students of Agricniture.
merous Tables of Analysis, By Samuel W. Johnson, MA.. Professor
of Analytical and Agricultural Chemistry in the Sheffield Scientific
School of Yale College; Cheist to the Connectient State Agricul-
teral Society; Member of the National Academy of Sciences. New
York: Orange Judd & Co. p. 394-

PROF, JOH SON, although a young man, is already known to the pub-
he se a conspicuous leader in the Sciences pertaining to Agriculture.
In eit is writings he displays an industrious habit of collecting, com-
paring, and judiciously arranging his facts. The present work will ma-
terially increase his enviable repute among chemists and agriculturists.
It seems to be well fitted to be a text-hock for Agricultural Schools,
and a reference-book for teachers of Chemistry and Botany.

A TREATISE ON PHYSIOLOGY AND HYGIENE: For Schools. Families, and
Colieges By J. C. Dalton, M.D., Professor of Physiology in the Col-
$1.50.
New
lege of Physiciens and Surgeons, New York. Pp. 399.
York: Harper & Brothers. London: Sampson Low, Son, & Mar-

Aton.
T's is a comely book, elegantly illustrated with woodcuts, substan
tally bound, and furnished with an admirable index. We only need add
that the author is one of the most eminent of American Physiologists,
and an experienced and graceful writer.

Pamphlets.

EARTH CLOSETS: How to make them and how to use them. By Geo.
Waring, Jr. Author of the Elements of Agriculture." and
"Desiring for Profit and Draining for Health," formerly Agricultural
Engineer of the Central Park, New York. Pp. 45. $0.25. New York:
The Tribune Association.

The Earth Closet is an invention by which dry earth, in a ne pow-
der 18 substituted for water in pvies and urinals. The object is to
add to the manurial resources of the country, and to abate some of the

PAPER ON BUILDING STONE. By Charles H. Porter, M.D. To the New
Capitol Commissioners. Pp. 4t.

DR. PORTER discourses of good and bad building stones, the causes of
deterioration, and the methods of determinir their value. The disc DB
ston is skilfully managed, and abounds in confirmative facts.
THE AMERICAN JOURNAL OF SCIENCE AND ARTS. Con lucted by Pro-
fessors B. SILLIMAN and JAMES D. DANA, &c., &c. For November.
Pp. 289 to 436 inclusive. $6.00 per annum.

f

THE chemical papers in this number are: 1. On the Molecular trac-
ture of Uric Acid and its Derivatives. By Prof. WOLCOTT 61869
Harvard University. The author endeavors to show that uric acid and
its derivatives are members of series, the limiting terms of which are on
the one side polymeric forms of cyanic acid, and on the other alcohols,
Starting with evanic acid
or their corresponding hydrocarbons,
(NCIHO) as a foundation, by plausible substitutions and changes in the
units of combination, he constructs series comprising not only urie seld
and its known derivatives, but an infinity of other possible compounds.
We commend the reading of this ingenious paper as a useful exercise
to those who are interested in the modern theories of chemistry. 2. On
By C. GREVILLE WII -
the Artificial Formation of Organic Substances
LIAMS. FR.S. This is a brief report of a semi-popular lecture delivered
before the Royal Institution. 3. On the Action of Sunlight on Bisalph-
ide of Carbon. By 0. LOEW, of the College of New York. Mr. Loew
exposes pure (!) bisulphide of carbon in sealed tubes to the sunlight,
and finds that it turns yellow, and at last a brownish insoluble substanee
Is precipitated, which he declares to be sesquisulphide of carbon. Bat
the chemical world has often been deceived by alleged discoveries of
a subsulphide of carbon, and Mr. Loew's position needs to be fortified
4. Notices of Papers in Physi-
by more facts than he has presented.
ological Chemistry. No. 3. By Prof. GRO, F. BARKER, of Yale Collige.
This series of notices brings within our reach the latest discoveries and
theories. Our obligation to Professor Barker is enduring and proband.
This number of the journal also contains valuable papers on the usan!
round of subjects. Every American ought to take pride in the co-
tinued prosperity of this venerable exponent of American science.
REPORT TO THE MANHATTAN GAB Co., on the Merits of the Lime and
New York: Office of the
Iron Methods of Gas Purification. Pp. 20.
American Gas Light Journal.

The conclusion to which the author (Prof. Henry Wurtz) arrives is that
the line purification is to be preferred. The report speaks with great
favor of a method used by the Gas Co. of preventing the offensive
The method consists simply in
smell when the purifiers are opened
driving air through the purifles before opening them, and carrying the
same air through a supplementary purifier charged with fresh lime.

ITEMS AND NOTES.

DR. R. P. STEVENS, who has for the past six months been employed in the exploration of the gold district of Guiana. Venezuela, S. A visited this city during November. He reports the new gold discoveries to be of great importance. His memory is kept green at our office by the skin of a boa 18 feet in length, and the skin of a South America leopard.

E. W. DIMOND has entered upon his duties as Prof. of Chemistry in Dartmonth College He will give a Course of Lectures on Pharmaceutical and Agricultural Chemistry in addition to the usual routine.

DR. C. F. CHANDLER, Chemist to the Metropolitan Board of Health, has recently, by analysis, &c.. examined the Croton water, and the breadstuffs used in this city. He reports favorably of the quality of both.

E. P. HARRIS, lately of Beloit, Wis., has been appointed Prof of Chemistry in Amherst College, to succeed W. S. Clark, now President of the Mass. Agricultural College.

H. F. WALLING, of New York, will commence his duties as Pret : Civil and Topographical Engineering, with the new year, at Lafayette College. Easton, Pa. He intends to prepare models of the principal cost and iron mines, and give special prominence in his instruction to mining engineering.

C. H. HITCHCOCK, recently appointed State Geologist of New Hamp shire, directs his attention chiefly to the mining interest, and has cor. menced his work by a preliminary examination of the gold district in the neighborhood of Lisbon. Prof. Hitchcock has also recently been added to the faculty of Dartmouth College. Next summer he will instruct a class in field geology.

C. A. GOESSMAN, Chemist of Salt Works at Salina, N. Y., is elected Prof of Chemistry in the Mass. Agricultural College.

E. W. Root, late Assistant in the School of Mines of Columbia Col lege, has been appointed Prof of Agricultural Chemisty in Hamten College. We regret to learn that illness keeps him away from his new

duties.

DR. G. L. GOODALE, of Saco, Me., is the new Professor of Chemistry in Bowdoin College.

A. P. ROCKWELL. Prof. of Mining in Yale College, is also Prof. of Mining Engineering in the Mass. Institute of Technology.

A. M. EDWARDS, as Prof. of Chemistry, sncceeds Dr. Chandler in the College of Pharmacy, and C. P. Stone in the Medical College for Women, all of this city.

PROFESSOR JOHN LE CONTE has left the University of South C to take the professorship of physics in the State University fornia.

Cali

.