258 ADDITIONS TO THE LIBRARY. 



Townsciul, C. C. The Mineral "Wealth of India. Svo. Bombay, 

 1801. Purchased. 



7'recJimami, C. 0. Twins of Marcasito in regular disposition upon 

 Cubes of Pyrites. Svo. London, 1891. 



Tschermalc, G, Die Chloritgruppc. I. u. II. Theil. Svo. Vienna, 

 1S90 & 1S91. 



Tyrrell^ J. B. Foraminifcra and Radiolaria from the Cretaceous of 

 Manitoba. 4to. Montreal, 1890. 



UlricJi, 6r. B. F. On the DiscoTery, Mode of Occurrence, and Dis- 

 tribution of the Nickel-Iron Alloy Awaruite, on the west coast of 

 the South Island of New Zealand. Svo. London, 1890. 



United States. Department of the Interim'. United States Geolo- 

 gical Survey. 8th Annual Eeport 1886-87. Parts 1 & 2. J. W. 

 Powell, Director. Svo. Washington (D.C.), 1889. 



. . . 9th Annual Report, 1887-88. J.W.Powell, 



Director. Svo. Washington (D.C.), 1889. 



. • , . J. W. Powell. Director. Bulletin. Nos. 



54-62, 64 & 66. 8vo. Washington (D.C.), 1889-90. 

 — . . . Mineral Resources of the United States. 



Calendar, year 1888, D. T. Day. Svo. Washington (D.C.), 1890. 

 Monographs. Vol. i. Lake Bonneville, by 



G. K. Gilbert. 4vo. Washington (D.C.), 1890. 



— . . . Monographs. Vol. xv. The Potomac or 



Younger Mesozoic Floi-a, by W. M. Fontaine. Text and Plates-. 

 4to. Washington (D.C.), 188^. 



— . . . . Yol. xvi. The Palaeozoic Fishes of 



North America, by J. S. Newberry. 4to. Washington (D.C.), 

 1889. 



. Engineer Department, U.S. x^nny. United States Geogra- 

 phical Surveys west of the 100th Meridian. Capt. G. M. Wheeler 

 in charge. Yol. i. Geographical Report. 4to. Washington, 1889. 



Upham, W. Artesian Wells in North and South Dakota. Svo. 

 Minneapolis, 1890. 



. On the Cause of the Glacial Period. Svo. Minneapolis, 



1890. 



. Report of Exploration of the Glacial Lake Agassiz, in Mani- 

 toba. Svo. Montreal, 1890. 



. The Fiords and Great Lake Basins of North America, 



considered as evidence of Preglacial Continental Elevation and of 

 Depression during the Glacial Period. Svo. , 1890? 



