eee 
vill CONTENTS. 
thopsis, a gigantic animal of the Pterodactyle kind from the Wealden, H. G. 
SEELEY: Volcanic Action on Hawaii, Trrus Coan, 393.—Geological MapofCan- | 
ada and the Northern United States, Sir W. E. Logan, 394.—Labradorite Rocks ‘ 
at Marblehead, T. Srerry Hunt: Explorations in the Rocky Mountains by J. D. 
Wuitvey, 398.—California Geological Survey: The Geological Survey of Ohio; 
its Progress in 1869: Sketches of Creation, etc., ALEXANDER WINCHELL: Iso- 
morphism of Gadolinite, Datolite and Euclase, RaMMELSBERG, 400.—Mineralogi- 
| contributions of G. vom Ratu: Reale Comitato Geologico d’ Italia, 401.— 
Gibbsite and Wavellite, Hermann: Hermann on Samarskite and the compounds 
tise on Quartz and Opal, etc., Gzorge WILLIAM TRAILL, 403. 
Botany and Zoology.—How Crops Feed; a Treatise on the Atmosphere and the 
Soil as related to the ac oe of Agtioultuval Plants, with illustrations, SamvEL 
W. Jounson, 403.—Martius, Flora Brasiliensis, fase. 48; — expos., 
C. F. Meissner: Development of the Flower of Piagaiou vulgaris, ete., A. 
Dickson: A Geographical Handbook of all the known . with Tables to : 
show their distribution, K. M. Lyeri: Bulletin of the Torrey Botanical Club, 
404.—Notes relating to Vegetable Physiology, etc., 405——Francis Unger: On 
deep-sea Dredging in the ao OTE of the British Isles in 1869, Dr. W. B. 
CaRPesTes, 410.—Secretion of Sulphuric acid by certain Gasteropods, Prof. 
TROSCHEL, 420.—On the discovery of the sensitiveness to light possessed by 
Unios, 422. —Report on the Invertebrata of Massachusetts, W. G. eae : 
. Crustacea, N 
O- 
grafia della Famiglia dei Pennatularii, RicHIARDI, 426.—The Batietics of 
North America, Wau. H. Epwarps, part 1, 427. 
Astronomy.—Elements of Felicitas (109) from observations of the first opposition, 
Wu. A. Rogers, 428.—On the Periods of certain Meteoric Rings, Danien 
Kirk woop, 429.—Abstracts from the Report of the Council “8 ss bran As- 
/ Wenbenkent Boctaty,; Feb., 1870, 431.—Star-Drift, R. A. Procto 
ce "te the Barometer and the Prevailing Winds over the pon for 
ie the Mont and for the Year, epee Society of London : Prizes for 
| Miscellaneous See Book of the Sulphur-Cure as applicable to the 
_ Vine disease in America, WiuLiaM J. nam GG, 442.—The Chemical Forces, Heat, 
Light, Electricity, with their applications: The Life of John James Audubon, 
—A Physician’s Problems, CHaRLEs Bram, 444 Proceedings of Societies, 
: 
—National Academy of ees 439.—The 
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