766 INDEX TO VOLUME XXI 
Secondary Precipitation of Gold in Ore Bodies, The. By Albert D. 
Brokaw ; : : . ; 
Sedimentary Rocks, A Seidys in the Beals: af Dis, By G. Sherburne 
Rogers : : : ‘ 
Seismological Secs of mene ulin of ihe ‘Welk I, No. 4, and 
Vol. II, No. 1. Review by E. A. S. : 
Shufeldt, R. W. Fossil Feathers and Sore iano Wareserned 
Fossil Birds 
Silver Ores, The Secondary ariehment of By H. Cc. Coals 
Sisley, Geo. E. The Mining World Index of Current iii, 
Review by A. D. B. ; 
Skulls of Araeoscelis and Casea, [Bevin Remwiles, T ihe. ike Samuel W. 
Williston 
Smith, Ph.D., Warren D. The Geoluey a aan P. IL. 
Smyth, C. Ee The Relative Solubilities of the Choiieall Conseieats 
of Rocks 
Solubilities, The Relative of the Chauioal Concutucnts of Rocks: By 
C@iHerSmnytheelire : 
South African Permian Reptiles, On the ele omeli aft to nase sf 
Russia. By R. Broom . 
Steidtmann, Edward. Review of (Ceoleey a Halibuneon and anerate 
Areas, Province of Ontario, by Frank D. Adams and Alfred E. 
Barlow 
Stephenson, E. A. iRewhas of Peanaion of Coal Beds, A IL, bye Jon 
J. Stevenson ‘ 3 : : . ‘ : 
Stevenson, John J. ‘‘Formation of Coal Beds.” II. iRevtsns be E. 
A. Stephenson . 
Stewart, Charles A. The Seven Ot Me Cordilleram Tee Sheet 
Tarr, R. S., and Lawrence Martin. Glacial Deposits of the Continental 
Type in Alaska : : i ‘ : : : : : : 
Triassic Fishes of Connecticut. By Charles R. Eastman. Review by 
B55 AN IS : 
Trowbridge, Arthur C. Some aces Dyasacted ints. in ie Daviess 
County, Illinois 
Udden, J. A. The Effect of Leaching on Drift Pebbles . : 
Umpleby, Joseph B. Geology and Ore Deposits of the Meyers Nain 
District, and Geology and Ore Deposits of the Oroville-Nighthawk 
Mining District. Review by E. A. S. 
The Old Erosion Surface in Idaho 
Unconformity at the Base of the Onondaga Limestone in New ne andl 
Its Equivalent West of Buffalo, The. By Edward M. Kindle 
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