7 
CONTENTS. vu 
NUMBER CXLIX. 
: Arr. XXXII.—Observations of the Transit of Venus, Dee. 
6, 1882, at Princeton, N. J., and South Hadley, "Mass 
(Communicated by Professor C. As YounG), soo slisite 321 
XXXUI, —Notes on the Occurrence of bi Minerals in 
Amelia County, Virginia; by Wm. F. Fonrarne,.-___- 330 
XXXIV.—Surface Limit or Thickness of the Continental 
sd in New Jersey and adjacent States; by J. C. 
Ore UN eee a ete 39 
XXXV.. oy Rarer se to the Geological Chemistry of Yel- 
ag National Park ; . LEFFMANN and 
ake Sree "351 
oo. 7, 
XXXVIIL—A Four Years’ Record of Earthquakes in Japan, 
studied in their a to the Weather and Seasons ; 
3 
Se ee 
rocks of Bomardston Mass. ; be R. P. Warrrter LD, .-: 2° $68 
XXXIX.—Rev of DeCandolle’s Origin of Cultivated 
Plants ; ah Annotations u _ certain American Spe- 
cies ; ; by A. Gray and J.-H. "TRumeuts, 6. 08) coc 370 
SCIENTIFIC INTELLIGENCE, 
Chemistry and Physics.—Change of volume produced by mixing solutions of 
salts, Nico, : 379.—Mutual displacement of Bases in — of their Neutral 
salts, MENScHUTKIN, 380.—Formation of Arsenides by P. yeeeee SPRING! 
Atomic Weight of Yttrium and Lanthanum, Cukve, 331.—Synthesis of Crypti- 
dine, Lexps, 382,—A Text-Book on the Elements of Physics, A. P. GAGE, 383. 
cology and Mineralogy.—Annual Report of the State Geologist of New Jersey, 
“tr 1882, G. H. Cook, 383.—Life of Sir William E. Logan, B. J. HARRINGTON, 
0. 1, W. Cae. Paleontology of the Geological Survey of New York, J. 
HALL, 391. —North American fossil asseray COPE: Brgy remains from the 
Silurian ee = Isle of Gotland, G. J. Hinpr: Review of the non-marine fossil 
Mollusca, C. A. Warr: Second Report of the State "Mineralogist of California, 
or 92.—Zur Kenntniss der vulcanischen Gesteine und Mineralien 
der Capvortchen Inseln von C. DozLTeR: Fluid-bearing Quartz Crystals, W. 
eee Zoology.—Essay on the Development of the Vegetable Kingdom, 
LER, 394.—Bidrag till Japans Fossila Flora, A. G. NaTHoRst, 396.— 
Structural and Systematic Conchology, G. W. Trron, Jr., 397. 
Miscellaneous Seient tifie Intelligence.—Report of the Supecaantet of bs United 
Se States Coast and ene gona of the year ending June, 1880: Telescopic — 
val a Society of London: 
Medals awarded Ba the Geological t Semel 6 Londou: The | : 
the’ ciety of Naturalists, 399.—National "Academy of Sciences: Index to 
Popular Science Monthly, 4 = 
