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SCIENTIFIC INTELLIGENCE.

Physics and Chemistry.-On the emission, absorption and reflexion of varieties

of heat radiated at low temperatures, MAGNUS, 105.-On the breadth of the

spectral lines, LIPPICH, 106.—On the position of thallium among the elements,

RAMMELSBERG: On a new method for the volumetric estimation of copper,

WEIL, 108.-On the utilization of the secondary products obtained in the manu-

facture of chloral, Dr. A. W. HOFMANN: On the nature of the secondary prod-

ucts obtained in the manufacture of chloral, KRAMER, 109.-On some properties

of iron precipitated by the galvanic current, LENZ, 110.—On the preparation of

barium chlorate, BRANDAU: On the properties of Selenium, RATHKE, 111.—On

the preparation of nitrogen pentoxyd (nitric anhydrid), ODET and VIGNON, 112.

-On a new method for preparing bromhydric acid, CHAMPION and PELLET: On

the recovery of Uranium from the Phosphate, HEINTZ, 113.-On the modifications

of sulphur trioxyd (sulphuric anhydrid), SCHULTZ-SELLACK: On the conversion of

iso-butyl alcohol into tertiary pseudo-butyl alcohol, MARKOWNIKOFF, 114.-Ou

the Synthesis of Aromatic Acids, WURTZ, 115.—On the volatile acids of Croton oil,

GEUTHER, 116.-On the Rhenish creosote from beech-wood tar, MARASSE, 117.

-On Ocean currents, in relation to the Distribution of Heat over the Globe,

JAMES CROLL, 118.

Geology. Sun-Pictures of Rocky Mountain Scenery, Dr. F. V. HAYDEN 125.-On

the Graphite of the Laurentian of Canada, J. W. DAWSON, 130.-On Laurentian

Rocks in Nova Scotia, T. STERRY HUNT, 132.-The Ornithosauria: an elementary

study of the bones of Pterodactyles, H. G. SEELEY. 134.-First Annual Report

of the Geological Survey of Indiana, made during the year 1869: Meek on

Crinoids: The lifted and subsided Rocks of America, with their influences on

the oceanic, atmospheric, and land currents and the distribution of Races, GEO.

CATLIN, 135.-Geological Survey of Iowa, 136.

Zoology.-Die bis jetzt bekannten Schildkröten, u. d. bei. Kelheim u. Hannover

neu aufgefunden altesten Arten derselben; von Dr. G. A. MAACK, 136.-On Dis-

cosaurus and its allies, Dr. J. LEIDY, 139.-On Elasmosaurus platyurus Cope,

Prof. E. D. COPE, 140.-A new species of Tapir. from Guatemala, Prof. THEO-

DORE GILL, 141.-Contributions to the Theory of Natural Selection, a Series of

Essays, ALFRED RUSSELL WALLACE, 142,

Astronomy.-Cordova Observatory under the direction of Dr. B. A. GOULD, 144.

-Recent Auroral displays in the United States, 146.

Miscellaneous Scientific Intelligence.-Variation in the Eccentricity of the Earth's

Orbit, 147.-Note on an Electrification of an Island, F. JENKIN, 148.-Baron

von Richthofen's Explorations in China: Thermal Units: Astronomer at the Cape

of Good Hope, 149.-American Association: British Association: Admiral

Russell Henry Manners, 150.

Miscellaneous Bibliography.—A concise analytical and logical Development of the

Atmospheric System as God made it, etc., THOMAS B. BUTLER: Synopsis of the

Extinct Batrachia and Reptilia of North America, Part 2d. EDWARD D. COPE:

First Principles of Chemical Philosophy, JOSIAH P. COOKE, Jr., 150.-Neue Un-

tersuchungen über den elektrisirten Sauerstoff; von Dr. G. MEISSNER: Great

Outline of Geography: a Text-Book to accompany the Universal Atlas, THEO-

DORE S. FAY: Geology and Revelation; or the ancient history of the earth con-

sidered in the light of Geological facts and revealed Religion, with Illustrations,

Rev. GERALD MOLLOY, 151.-Reliquiæ Aquitanicæ, being contributions to the

Archæology and Palæontology of Périgord and the adjoining Provinces of South-

ern France, E. LARTET and HENRY Christy, 152.

ART. XVI.-Comparison of the mean daily range of the

Magnetic Declination, with the number of Auroras ob-

served each year, and the extent of the black spots on

the Surface of the Sun; by ELIAS LOOMIS,

XVII.-On a new Period in Chronology, called the Preces-

sion Period; by J. W. FRENCH,-.

XVIII.-Upon the Atomic Volumes of Solid Compounds;

by FRANK WIGGLESWORTH CLARKE,

XIX. Considerations on the apparent inequalities of long

period in the mean motion of the Moon; by SIMON

XX.-Researches in Electro-Magnetism; by ALFRED M.

XXI.-Abstract of the Second Series of Professor Meissner's

Researches upon Electrized Oxygen; by GEORGE F.

XXII.-Description of Sclerostoma pinguicola, a new species

of Entozoa, from the Hog; by A. E. VERRILL,

XXIII-Notes on the structure of the Crinoidea, Cystidea

and Blastoidea; by E. BILLINGS, -

XXIV. Contributions to Chemistry from the Laboratory

of the Lawrence Scientific School. No. 12,

XXVI.-On the Corona seen in Total Eclipses of the Sun;

by W. A. NORTON, - -

XXVII. Observations on Prehistoric Archæology in Greece;

by GEORGE FINLAY,-

SCIENTIFIC INTELLIGENCE.

Chemistry and Physics.-On the theory of the Bunsen flame, KNAPP: Production

of Ozone in Rapid Combustion, THAN, 255.-On the Constitution of Narcotine

and its decomposition-products, MATTHIESSEN, 256.-On the size of Molecules,

Sir WM. THOMPSON, 258.-Comparison of Mechanical Equivalents, PLINY EARLE

Geology and Mineralogy.--On a Fossil Tooth from Table Mountain, W. P. BLAKE,

262.-Cause of the Descent of Glaciers, MOSELEY, BALL, 263.—The North Amer-

ican Lakes considered as Chronometers of Post-glacial time, EDMUND ANDREWS,

264.-Fossils in the Mineral veins of the Carboniferous Limestone of Great

Britain, C. MOORE. 265.-Additional note on Elasmosaurus, E. D. COPE, 268.-

Lias and Oolite of Australia, C. MOORE: Plants of the Coal formation of Langeac,

Haute-Loire, H. B. GEINITZ, 269.-Sivatherium in Colorado: Megalonyx Jeffer-

soni in Illinois: Mineralogical Contributions of G. vom Rath: Laxmannite of

Nordenskiöld, 270.-Phosphorchromite: Wolframite: Namaqualite, a new ore

of Copper: Contributions to the Mineralogy of Victoria, G. H. S. Ulrich, 271.

-On Sellaite, a new native fluorid, Dr. STRUVER: Ambrosite, C. U. SHEPARD:

On the Guanape Island Guano and its minerals, C. U. SHEPARD, 273.

Botany and Zoology.-Miscellaneous Botanical Notices and Observations, 274.-

Carbolizing Birds, H. W. PARKER, 283.-A Synopsis of the Family Unionidæ,

ISAAC LEA, 284.-Commensalism among Animals, VAN BENEDEN, 285.

Astronomy.-Discovery of a new Asteroid, the 111th, Dr. C. H. F. PETERS, 285.

Miscellaneous Scientific Intelligence.-Nineteenth Meeting of the American Associa-

tion for the Advancement of Science, held in Troy, N. Y., August 17-25, 1870,

286.-On "Pure Scarlet," WM. H. DALL, 291-Professor Marsh's Rocky Moun-

taln Expedition; Discovery of the Mauvaises Terres formation in Colorado,

MARSH: Glaciers of Scotland, CROLL, 292.-Meteoric Irons: Fall of a Meteorite in

Stewart Co., Georgia, J. LAWRENCE SMITH: Prof. HELMHOLTZ, Prof. J. WATSON:

On the occurrence of a Peat bed beneath deposits of Drift in Southwestern Ohio,

Professor EDWARD ORTON: Woodward on the Magnesium and Electric Lights

for Photo-micrography, 293.-Obituary.-JACOB P. GIRAUD, JR., 293.—Mr. A. H.

Miscellaneous Bibliography.-The Audes and the Amazon, or across the Continent

of South America, JAMES ORTON: The Chemical History of the Six Days of

Creation, JOHN PHIN, 294.-The American Chemist, a Monthly Journal of The-

oretical, Analytical and Technical Chemistry, edited by C. F. and W. H.

CHANDLER: On the Gulf Stream, and the Thermometric knowledge of the At-

lantic Ocean and adjoining lands in the year 1870, Dr. A. PETERMANN: Roasting

of Gold and Silver Ores, and extraction of their respective metals without

quicksilver, G. KUSTEL, 295.-Reports, etc., 296.

ART. XXVIII.—On the examination of the Bessemer Flame

with Colored Glasses and with the Spectroscope; by

J. M. SILLIMAN,.

XXIX.—On a simple method of measuring Electrical Con-

ductivities by means of two equal and opposed magneto-

electric currents or waves; by ALFRED M. MAYER,-

XXX.-On the supposed absence of the Northern Drift from

the Pacific Slope of the Rocky Mountains; by ROBERT

XXXI.-Extracts from the Address of GEORGE Bentham,

Esq., President of the Linnean Society, May 20th, 1870, 325

XXXII.-Account of the fall of a Meteoric Stone in Stewart

county, Georgia; by JOSEPH E. WILLET,..

XXXIII.-Description and Analysis of a Metoric Stone that

fell in Stewart county, Ga. (Stewart county Meteorite),

on the 6th of October, 1869; by J. LAWRENCE SMITH, 339

XXXIV.-Some practical remarks on the use of Flame Heat

in the Chemical Laboratory, especially that from burning

gas without the aid of a blast; by J. LAWRENCE SMITH, 341

XXXV.--On the connection between Terrestrial Tempera-

ture and Solar Spots; by CLEVELAND ABBE,

XXXVI.--On a new method of determining Level-error of

the axis of a meridian instrument; by C. A. YOUNG, 348

XXXVII.-Influence of Temperature on the modulus of

Elasticity of certain Metals; by F. KOHLRAUSCH and

FRANCIS E. LOOMIS,-

XXXVIII-On the Oxy-Calcium Light as applied to Photo-

Micrography; by J. J. WOODWARD,

XXXIX.-On the Secular Perturbations of the Planets; by

XL--Farmer's Theorem discussed; by FRED. E. STIMPSON, 372

XLI.--Note on Mr. Stimpson's Paper on Farmer's Theorem;

by B. SILLIMAN,...

XLII.-On the Determination of the Photometric Power of

a rich gas by dilution with a poor gas of known value;

the "method of mixtures;" by B. SILLIMAN,-

XLIII.-Address of Thomas Henry Huxley, at the meeting

of the British Association at Liverpool, on the 14th of

XLIV. The Hail-storm of June 20th, 1870; by HORACE C.

XLV.-Photograph of a Solar Prominence; by C. A. YOUNG, 404

XLVL--Contributions to Zoology from the Museum of Yale

College. No. 8.-Descriptions of some New England

Nudibranchiata; by A. E. VERRILL,

XLVII.--On a recent Earthquake at Bogota, S. A.; by S. A.

XLVIII.--Discovery of a new Planet, the 112th, named Iphi-

genia; by C. H. F. PETERS,

XLIX.--Geological Explorations in China; by Baron von

SCIENTIFIC INTELLIGENCE.

Chemistry and Physics.-On the influence of electricity on, air and oxygen as a

means of producing ozone, HOUZEAU, 413.-Researches on Platinum.-SCHÜTZEN-

BERGER, 414.-On new derivatives of triethylphosphine, CAHOURS and GAL, 415.

-On silico-propionic acid, FRIEDEL and LADENBURG: On normal amylic alcohol,

LIEBEN and Rossi, 416.-Transformation of the fatty acids into the correspond-

ing alcohols, SAYTZEFF, 417.

Geology and Mineralogy.-Laurentian Rocks of Nova Scotia, by Rev. Dr. HONEY-

MAN, 417.-Descriptions of Fossils collected by the U. S. Geological Survey

under the charge of Clarence King, Esq., MEEK: Discovery of a Mastodon,

422.--Description of the Cavern of Bruniquel, aud its organic Contents, by

Professor OWEN, 423.-The North American Lakes as Chronometers of Post-

glacial time, Dr. E. ANDREWS: Descriptions of new Fossil Shells of the Upper

Amazon, by T. A. CONRAD: Restoration of a Flying Dragon (Dimorphodon ma-

cronyx 0.) from fossil remains in the Lias-cliffs of Dorsetshire, by Prof. OwES,

424.--Remarks on Prof. Owen's Monograph on Dimorphodon, by H. G. SEELEY :

Geological Charts: Carte Géologique du versant Occidental de L'Oural, by

VALERIEN DE MÖLLER: Second annual Report upon the Geology and Mineralogy

of the State of Hampshire, by C. H. HITCHCOCK, 425.

Botany and Zoology.-Martius, Flora Brasiliensis, fasc. xlix, Cyatheaceæ et Poly-

podiaceæ, exposuit J. G. BAKER, 425. — Anatomisch-Systematische Beschrei

bung der Alcyonarien, Erste Abtheilung; die Pennatuliden, erste Hälfte, von

A. KÖLLIKER: The External and Internal Parasites of Man and Domestic Ani-

mals, by A. E. VERRILL, 430.-On the Eared Seals (Otariada), with detailed

descriptions of the North Pacific species, by J. A. ALLEN, etc., and CHARLES

BRYANT: Record of American Entomology for the year 1869, edited by A. S.

PACKARD, Jr., 431.-Antero-posterior Symmetry, with special reference to the

Muscles of the Limbs, by ELLIOTT COUES: On the Hypothesis of Evolution, by

EDWARD D. COPE, 432.

Astronomy.-Elements of the new planet Ate, by Dr. C. H. F. PETERS, 432.

Miscellaneous Scientific Intelligence.-On the Chemistry of the Bessemer process, DUT-

TON, 432.-Earthquake of Oct. 20th, 1870, 434.-Kansas Nat. Hist. Society, 435.

-Corrections of errata in the "Notes on the structure of the Crinoidea, etc.," 436.

-Obituary.-Capt. J. Pedersen. 436.-Dr. W. A. Miller: Dr. A. Mattheissen. 437.

Miscellaneous Bibliography.—Transactions of the Connecticut Academy of Arts

and Sciences, Vol. II, Part I, 437.-A Treatise on Elementary Geometry, by

Prof. WILLIAM CHAUVENET: Grundzüge einer allgemeinen Theorie der Ober-

flächen in synthetischer Behandlung, von LUDWIG CREMONA, 438.-A historical

and descriptive narrative of the Mammoth Cave of Kentucky, by W. STUMP

NORWOOD: Tent life in Siberia, and Adventures among the Koraks and other

Tribes in Northern Kamtchatka and Northern Asia, by GEORGE KINNAN: Report

of the Superintendent of the U. S. Coast Survey, showing the progress of the

Survey during the year 1867: Treatise on the power of Water as applied to

drive Flour Mills, etc., by JOSEPH GLYNN, F.R.S., 439.-Archives of Sc ence

and Transactions of the Orleans Co. Society of Natural Sciences: The American

Entomologist and Botanist: Geology and Revelation, or the Ancient History of

the Earth, by the Rev. GERALD MOLLOY, D.D., 440.

Books received: Proceedings of Societies etc., 440.

Index to vols, xli-1, 441.

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