58 
DONS. 
SÉANCES DU 2 ET DU 16 FÉVRIER 1891 
New-Haven. — The American Journal of Science. 
34 ser. Vol. XLI, n° 242, febr. 1891. 
W. P. Headden : Columbite and Tantalite from the Black Hills of South Dakota, 
p. 83-89. — N. H. Darton : Notes on the Geology of the Florida Phosphate Deposits, 
p. 102-103. — Id. : Record of a deep well at Lake Worth, Southern Florida, p. 105- 
106. — S. L. Penfîeld : Chemical Composition of Aurichalcite, p. 106-110. — C. R. 
Van Hise : Attempt to liarmonize some apparently conflicting views of LakeSuperior 
Stratigraphy, p. 117-138. — W. N. Melville: Powellite, Calcium Molybdate, 
p. 138-141. — O. C. Marsh : Gigantic Ceratopsidæ or horned Dinosaurs of North 
America, p. 167-178, 10 pl. 
Index to volumes XXXI-XL, 1891. 
Washington. — Bulletin of the United States Geological Survey. 
58-61, 63, 64, 66, 1890. 
(58). G. F. Wright : The Glacial Boundary in Western Pennsylvania, Ohio, Ken- 
tucky, Indiana, and Illinois, 112 p., 8 pl. — (59) Fr. D. Chester : The Gabbros and 
associated rocks in Delaware, 45 p., 1 pl. — (60) F. W. Clarke : Report of work done 
in the division of chemistry and physics, mainly during the fiscal years 1887-’88, 
175 p. — (61) W. H. Melville a. W. Lundgren : Contributions to the Mineralogy of 
the Pacific Coast, 31 p., 3 pl. — (63) A. W. Vodges : A Bibliography of Paleozoic 
Crustacea from 1698 to 1889, 177 p. — (64) F. W. Clarke : A Report of work done in 
the division of chemistry and physics mainly during the fiscal year 1888-89, 60 p. — 
(66) J. P. Hiddings : On a group of volcanic rocks from the Tewan Mountains, New 
Mexico, and on the occurrence of primary quartz in certain basalts, 34 p. 
— 9 th annual Report of the United States Geological Survey. 
1887-88. 1889. 
Report of the Director, p. 1-46. — Administrative reports, p. 47-199. — Cl. E. 
Dutton : The Charleston Earthquake of august 31, 1886, p. 201-528, pl. 7, 31 pl. — 
N. S. Shaler : The Geology of Cape Ann, Massachusets, p. 529-612, pl. XXXII-XLIX. 
— W. H. Weed : Formation of travertine and siliceous sinter by the végétation of 
hot springs, p. 613-676, pl. LXXVIII-LXXXVII. — Ch. A. White : On the Geology 
and Physiography of a portion of Northwestern Colorado and adjacent parts of 
Utah and Wyoming, p. 677-712, pl. LXXXVIII. 
— Monographs of the United States Geological Survey. 
Vol. I, 1890. 
Grove Karl Gilbert : Lake Bonneville, 438 p., 30 pl. 
— Minerai Resources of the United Stades. Calendar year 1888. 
1890. 
Grande-Bretagne. — Londres. — Proceedings of the Royal 
Society. 
Vol. XLVIII, n° 295, 296. 
