﻿- 538 - 



bibliography and syumiyung by John M. Nickles. and Rays Bassler. — 

 Washington, 1900. — S. 287. 



U. S. geológica! survey. 



Bulletin N.o 174. — Survey of the northwestern bondary of the U. 

 S. 1857 — 1861 by Marcus Baker.— Washington, 1900. — S. 289. 



U. S. geological survey. 



Bulletin N.o 175. — Triangulation and spirit leveling in Indian Terri- 

 tory by C. H. Titch. — Washington, 1900. — S. 290, 



U. S. geological survey. 



Bulletin N,o 176. — Some principies and methods of rock analyses 

 by William Francis Hillebrand. — Washington, 1900. — S. 291. 



U. S. geological survey. 



Bulletin N.o 178. — The El Paso tin deposits by Walter Harvey 

 Weed. — Washington, 1901. — S. 293. 



U. S. geological survey. 



Bulletin N.o 179. — -Bibliography and catalogue of the fossil vertebra 

 ta of North xA.merica by Oliver Perry Hay. — Washington, 1902. — S. 

 296. 



L . S. geological survey, 



Bulletin N.o 180. — The occurrence and distribution of corundum in 

 the U. S, by Joseph Hyde Pratt. — Washington, 1901. — S. 295. 



U. S. geological survey. 



Bulletin N.o 181. — Results ofprimary triangulation and primary tra- 

 verse fiscal year 1900 — 01, by H. M. Wilson; J. H. Renshawe; E, M. 

 Douglas and R. U. Goode. — W^ashington, 1901. — 296. 



U. S. geological survey. 



Bulletin N.o 182. — A report on the economic geology of the silver- 

 ton quadrangle, Colorado, by Frederick Leslie Ransome. — Washing- 

 ton, 1901:— S. 297. 



