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XXII.-Sliding Friction on an Inclined Plane; A. S. KIMBALL, 181
XXIII.—On the constitutional formulæ of Urea, Uric Acid,
and their derivatives; by J. W. MALLET ---------... 185
XXIV.-On Flint-implements from the Stratified Drift of
the vicinity of Richmond, Va; by CHARLES M. WALLACE, 195
XXV.-Description of a new Trilobite, Dalmanites dentata;
by S. T. BARRETT,---------
XXVI.--On the Samarskite of Mitchel County, North Caro-
lina ; by EDWARD S. DANA, -- --------------------
XXVII.- Effect of Silicic Acid upon the estimation of Phos-
phoric acid by Ammonium Molybdate; E. H. JENKINS, - 204
XXVIII. On the youngest Huronian Rocks south of Lake
Superior and the age of the Copper-bearing Series; by
T. B. BROOKS, ---- ......
XXIX.-On a new Method of measuring the Velocity of Elec-
tricity; by Joseph LOVERING ---...
APPENDIX.-XXX.-Principal Characters of the Tillodontia;
by 0. C. MARSH, .--.---... ------ .............. 249
Chemistry and Physics.—Problems in Chemical Dynamics, BERTHELOT, 214.---
Action of Light on Silver Bromide. Vogel., 215.-Corrosion of Platinum stills
by Sulphuric Acid, SCHEURER-KESTNER: Production of a Secondary Hexyl Alco-
hol, OECHSNER DE CONINCK, 216.-Rosolic Acid, GRAEBE and CARO, 217.--Syn.
thesis of Betaine, GRIESS: New Acid isomeric with Alizarin, SoHUNK and Roe-
MER : Constitution of Acids and Salts, BERTHELOT, 218.-Division of an Acid
among several Bases, BERTHELOT, 219.--New Pyrheliometer, CROVA, 220.- Ther-
mal Equivalent of Magnetism, CAZIN : Leyden Jar Regulator, MCLEOD, 22).-
Report to the Philosophical Society of Glasgow on the Production of Nitric acid
from the free Nitrogen of the Air, E. M. Dixon, 222.-On the Electrical Con-
ductivity of stretched Silver wires, J. G. MACGREGOR: The Nature of Light, by
E, LAMMEL, 224,- Manual of Introductory Chemical Practice, for the use of
Students, by G. C. CALDWELL: Electrical Conductivity of Saline Solutions, by J.
G. MACGREGOR, 225.
Geology and Mineralogy.-Supposed Agency of Ice-Floes in the Champlain Period,
by A. WINCHELL, 225.-Outlet of the Great Salt Lake, by G. K. GILBERT, 228.--
Second Report of Progress of the Mineralogical, Geological and Physical Survey
of the State of Georgia, by G. LITTLE, 229.–Geological Survey of Ulinois, A. H.
WORTHEN, Director, etc., vol. vi: U. S. Geological Survey of the Territories under
Dr. F. V. HAYDEN, 231.-Geological Sketches by L. Igassiz: Geological Survey
of Victoria, Report of Progress, R. B. SMYTH, 232.-Glacial phenomena along
the Kittatinny or Blue Mountain: Wisconsin Geological Survey: Frequency of
Earthquakes relatively to the age of the Moon, A. PERREY, 233.-Fossil Fishes
of the Devonian of Tula, H. TRAUTSCHOLD); Occurrence of native Zinc: Brookite:
Serpentines of Zöblitz Greifendorf and Waldheim. J. LEMBERG, 237,-Selwyn-
ite, Noumeïte, Garnierite, G. H. F. ULRICH : Errata to Manual of Geology of J.
D. Dana, 235.
Botany.-Notes on Agave, by Geo. ENGELMANN, 235.-Structure of the Leaves
of Grasses, J. DUVAL-JOUVE, 237.-Botryopteris Forensis: Silicified fossil Fruits
or Seeds: Respiration of Plants, MAYER and WOLKOFF, 238.--Classification of
Nostochineæ: Gymocladus in China : Flora Brasiliensis: Das Haustorium der
Loranthaceen und der Thallus der Rafflesiaceen und Balanophoreen, 239.--The
Movements and Habits of Climbing Plants, C. DARWIN, 240,
Astronomy.—A series of Astronomical Drawings for the Centennial Exhibition :
Our Place among Infinities, R. A. PROCTOR, 241.
Miscellaneous Scientific Intelligence.- Mt. St. Elias: Harbors of Alaska and the Tides
and Currents in their vicinity, by W. H. Dall, 242.-Memoirs of the Peabody
Academy of Science: Annual Report of the Chief of Engineers to the Secretary
of War, for 1875, 243.- Annual Report upon the Geographical Explorations and
Surveys west of the 100th Meridian; by G. M. WHEELER, 244.—Geological Sur-
vey of the Territories, F. V. HAYDEN, 245.-Specific gravity Balance of R. Parish:
Bulletin of the Bussey Institute, 246.- American Museum, Central Park, New
York, 247.-Summer Schools of Zoology and Geology at Cornell University:
Annuaire de la Officina Central Meteorologica De Santiago De Chile, 1873,
248.- Obituary.—George Poulett Scrope, 248.
ART. XXXI.-On the Gases contained in Meteorites; by
ARTHUR W. WRIGHT,------
XXXII.—Review of Croll's Climate and Time with especial
reference to the Physical Theories of Climate maintained
therein; by SIMON NEWCOMB,-...
XXXIII.-On crystals of Tourmaline with enveloped Ortbo-
clase; by EDWARD H. WILLIAMS, JR., - -----... 273
XXXIV.—The Conglomerate Series of West Virginia ; by
William M. FONTAINE, ---- ....
XXXV.-Results of Experiments on the Set of bars of
Wood, Iron, and Steel, after a Transverse Stress; by
Wm. A. NORTON,-..
XXXVI.-On the constitutional formulæ of Urea, Uric Acid,
and their derivatives (concluded); by J. W. MALLETT, 291
XXXVII —Evidences of horizontal crushing in the formation
of the Coast Range of California; by JOSEPH LE CONTE, 297
XXXVIII.—Description of Mancasellus brachyurus, a new
fresh-water Isopod; by O. HARGER, ----...--------- 304
XXXIX.- Professor Tyndall on Germs, ---
XL.—Discovery of a new Planet; by C. H. F. PETERS, --... 317
APPENDIX.-XLI. - Principal Characters of the Brontothe-
ridæ ; by 0. C. MARSH, -------
Chemistry and Physics.-On a Crystallized Hydrate of Hydrochloric acid, PIERRE
and PUCHOT: On the decomposition of Water by Platinum, DEVILLE and DEBRAY,
318.- On a new compound of Sulphur and Oxygen, R. WEBER: On the Purifi-
cation of Carbon disulphide, FRIEDBERG, 319.-- The new Metal Gallium, Bois-
BAUDRAN: Conductivity of Gases, M. A. WINKELMANN, 320.— Thermal Properties
of Liquids, M. PICTET: Dependence of Electrical Resistance on the Motion of the
Conductor, M. EDLUND, 321.-Electric Spark with large Batteries, DE LA RUE and
MULLER, 322.—Acoustics, A. M. MAYER, 324.
Botany and Zoology.-Botanical Contributions, 325.- Botanical Necrology: Life
Histories of Animals, including Man, by A. S. PACKARD, JR., 326.-On some re-
markable forms of Animal Life from the great deeps off the Norwegian Coast,
etc., by GEORGE 0. SARS, 328.- A Course of Practical Instruction in Elementary
Biology, by HUXLEY and MARTIN: Crustacea of Mexico and Central America, by
M. A. MilNE-EDWARDS: Cumacea from great depths in the Arctic Ocean, by
G. O SARS, 329.- Moa or Dinornis of New Zealand : Carnivorous Reptiles
having some features of Carnivorous Mammals, from the Triassic (?) of South
Africa, Prof. Owen: The Crustacean, Artemia salina, changed in some of its
characters, etc., W. J. SCHMANKEWITSCH, 330.
Astronomy.- Astronomical and Meteorological Observations made during the year
1873, at the U. S. Observatory, Rear-Admiral B. F. SANDS, Superintendent:
Auxiliary Tables for determining the angle of position of the sun's axis, 331.
Viscellaneous Scientific Intelligence. - Third Report of the Settle Caves (Victoria
Cave) Committee of Exploration, by R. H. TIDDEMAN, 331.- Air and its Relations
to Life, by WALTER N. HARTLEY: Geological and Geographical Survey of the
Territories, F. V. HAYDEN in charge: Compressed Peat: Report of the Superin-
tendent of the U. S. Coast Survey, 332.- Obituary.-I. A. Lapham, 333.-Rev.
Augustus Wing, 334.
ART. XLII.-On supposed changes in the Nebula M. 17=
h. 2008=G. C. 4403; by EDWARD S. HOLDEN,- ....... 341
XLIII.-. On the effect of thin plates of Iron used as armatures
for Electro-Magnets, and a new form of Induction Coil;
by John TROWBRIDGE, -----
XLIV.-Concerning Phosphorus Oxychloride; by Ira REM-
XLV.-On additional species of Fossils from the Primordial
of Troy and Lansingburgh, Rensselaer County, N. Y.;
by S. W. FORD,--.---...--...------...
XLVI.-On a simple and very accurate method of tuning
two Forks to unison; by ROBERT SPICE, ------ ........ 372
XLVII.- Silica of grasses and other plants carried up as Di-
atoms or other siliceous grains, and not in solution or as
soluble silicates; by P. B. WILSON, ..... ........ 373
XLVIII.—The Conglomerate Series of West Virginia ; by
William M. FONTAINE -----
XLIX.—On new twins of Staurolite and Pyrrhotite; by ED-
WARD S. DANA, --...--
L-Researches on the Solid Carbon Compounds in Meteor-
ites; by J. LAWRENCE SMITH, -------
LI.-On the Oxidation product of Glycogen with Bromine,
Silver Oxide and Water; by R. H. CHITTENDEN, ... -- 395
LII.—On the existence or not of Horns in the Dinocerata;
by RICHARD OWEN, ----
APPENDIX.-LIII.-On some Characters of the genus Co-
ryphodon; by O. C. MARSH, ........................ 243
Chemistry and Physics.-Diplometer, LANDOLF: Specific Heat of Gases, WIEDE-
MANN, 403.-Crooke's Radiometer, STONEY, 404.—The Gram Magneto-electric
machine, TRESCA, 405.—Effect of increase of temperature on the Index of Re-
fraction, MENDENHALL, 406.
Geology and Mineralogy.--Does the actual vegetation of the Globe furnish any
general marks by which it could be recognized in all countries if it became fos-
sil? 407.-Report of the Geological Survey of Ohio, by J. S. NEWBERRY, 409,-
Geological Survey of Alabama, by EUG. A. SMITH, 410.--The Geological Record
for 1874, by Wu. WHITAKER, 411.-Report on the Geology of a portion of Colo-
rado examined in 1873, by J. J. STEVENSON: Das Gebirge um Hallstatt, von
MOJSISOVICS, 412.- Rammelsberg; Handbuch der Mineral-Chemie: Einleitung
in die Krystallberechnung, von CARL KLEIN, 413.
Botany and Zoology.-Phænological observations in Giessen, HOFFMAN: Bulletin of
the Bussey Institution, Harvard University, 414.-Nymphæa flava: Note on
some of the Starfishes of the New England Coast, by A. E. VERRILL, 416.—
Häckel's theory (Allæogenesis) of the genetic connection between the Geryon.
idæ and Æginidæ, by A. AGASSIZ, 420.-Animal Parasites and Messmates, VAN
BENEDEN : The Journal of Anatomy and Physiology, conducted by G. M. Hum.
PHREY. 421.-Bulletin No. 2, U. S. Geological Survey of the Territories, 422.
Astronomy. Observations of the planet Jupiter: Repertory of works in Pure and
Mixed Mathematics, KENIGSBERGER and ZEUNER, 422.
Miscellaneous Scientific Intelligence.—The American Cyclopædia, 422.-Annual
Report of the Light-House Board to the Secretary of the Treasury for the year
1875: Meter-Diagram, 423.- Obituary.-A. R. MARVINE, 424.
Art. LIV.-Note on the Duplicity of the “ 1474” line in the
Solar Spectrum; by C. A. YOUNG, ------------------ 429
LV.-On a Lithia-bearing Biotite; by G. W. HAWES, ------ 431
LVI.—Researches on the Solid Carbon Compounds in Mete-
orites; by J. LAWRENCE Smith,------
LVII.—Results of Experiments on Contact Resistance; by
W. A. Norton, .......
LVIII.-Physical Observations on Saturn; by L. TROUVELOT, 447
LIX.-Curve of Eccentricity of the Earth's orbit; by R. W.
LX.—On a Bolide of January 31st, that passed over Ken-
tucky; by J. LAWRENCE SMITH,-.---. ............ 458
LXI.-Notes on the Sensitiveness of Silver Bromide to the
Green Rays as modified by the Presence of other Sub-
stances; by M. CAREY LEA, ---..
LXII.-Chemical Composition of Durangite; by G. J. BRUSH, 464
LXIII. — The Geological Survey of Brazil; by C. F. HARTT, 466
LXIV.—Meteoric Stone of Waconda; by C. Ú. SHEPARD, Sr., 473
LXV.-Paleozoic Subdivisions on the 40th Parallel; by
CLARENCE KING, -----------------------...----... 475
LXVI.—A Nebula-photometer; by E. C. PICKERING, ------ 482
LXVII.-On a new Sub-order of Pterosauria; by 0. C. Marsh, 507
LXVIII.—Notice of new Odontornithes; by 0. C. Marsh, ---- 509
Chemistry and Physics.-Hydrocellulose, GIRARD, 483.—Decomposition of Stearic
Acid by distillation under Pressure, JOHNSTON: Liquid Carbon Dioxide in min-
eral cavities, HARTLEY: Decomposition of Alcohol by Aluminum and its Iodide,
GLADSTONE and TRIBE, 484.–New Method for producing Condensed Hydrocar-
bons, WATSON SMITH: Manganese Boride and on the Function of Manganese in
Iron Metallurgy, TROOST and HAUTEFEUILLE, 485.-Occurrence of Platinum, Pal-
ladium, and Selenium in Silver coins, RÖSSLER: Conversion of Olefines into the
corresponding Alcohols, BOUTLEROW, 486.-Trimethylbenzols of Coal tar Oil
and their Separation from each other, JACOBSEN: Detection of Phloroglucin and
Nitrites, WESELSKY: Succinic acid obtained from Active Tartaric acid, BREMER
and VAN'T HOFF, 487. - Re-conversion of Paroxybenzoic acid into Salicylic acid,
KUPFERBERG: New Hydro-oxy-benzoic Acid, EMMERLING and OPPENHEIM: Vicin,
RITTHAUSEN: Acoustic Attractions, DVORAK,488.-Correlation of Forces, GROVE,
489.-Change of Volume of Electric Conductors, ExNER: Proper Motion of the
Stars, SECCHI, 490.
Geology and Mineralogy.-Paleozoic fossils from the Serpentine formation of
Chaberton 491. - Eozoon Canadense: Exploration of Lake Titicaca, A. AGASSIZ
492.-Huronian South of Lake Superior, ROLAND IRVING: fossil bird from
the Eocene of New Mexico, COPE: Richmond Infusorial Stratum, 493.-Car-
boniferous Articulates: Note on the Uinta and Wahsatch Ranges, C. KING:
Ceraurus pleurexanthemus, of Trenton Falls. C. D. WALCOTT, 494.-Glacial
phenomena in Jefferson Co., New York: Origin of the Porphyry of Marble-
head, Mass., 495.--Hayden's Report for 1874, 496.--Age of Angiospermous
plants referred to the Cretaceous, 497.-Swiss Paleontological Society: Geo-
logical Survey of New Jersey, Cook: Eocene Corals of Italy, 498.--Crystallo.
graphy, of P. GROTH, 499.
Zoology.---Recent Corals from Tilibiche, Peru. A. AGASSIZ, 499.--Caspian Sea, 500.
Astronomy.--Transit of Venus observed in Bengal: new Planets, 501.
Miscellaneous Scientific Intelligence.-Atti della Reale Accademia dei Lincei, 502.--
Statistics of Mines and Mining R. W. RAYMOND, 504.--National Academy of
Sciences: Memoir of Caroline Herschel, 505.--Depth of the Pacific, 506.
JOURNAL OF SCIENCE AND ARTS.
ART. I.- Contributions to Meteorology, being Results derived from
an examination of the United States Weather Maps and from other sources ; by ELIAS LOOMIS, Professor of Natural Philosophy in Yale College. Fourth paper. With Plate. [Read before the National Academy of Sciences, Philadelphia, Nov. 2, 1876.]
Movement of Areas of high barometer. HAVING determined the average direction and velocity of movement of areas of low barometer within the limits of the United States, I desired to make a similar determination respecting areas of high barometer. As I have in my possession only one Weather Map for each day, I have frequently found it difficult to follow the course of areas of high barometer from day to day, and have therefore confined my comparison to the monthly charts published by the U. S. chief signal officer. Among these I found three charts which gave the tracks of areas of high barometer for a month each, viz: Aug., 1873, Dec., 1874, and Jan., 1875. The following are the average courses and velocities of the areas of high barometer for these months :