BIBLIOGRAPHY OF G. K. GILBERT 



250. 



Orton, Edward. 



251. 



Owen, Richard. 



252. 



Pacific Oceau. 



253. 



Paleozoic era. 



254. 



Permian series. 



255. 



Phillips. J. 



256. 



Physical geography. 



257. 



Physiography. 



25S. 



Pikes Peak. 



259. 



Plains. Great. 



260. 



Pleistocene period. 



261. 



Pliocene period. 



262. 



Pothole. 



263. 



Potsdam sandstone. 



264. 



Proterozoic era. 



265. 



Quaternary. 



266. 



Quicksand. 



267. 



Rainier. Mount. 





Johnson's Cyclopedia, volume 7. 



268. 



Ripple-marks. 



269. 



Sand. 



270. 



Sandstone. 



271. 



San Francisco Mountain. 



272. 



Seismograph. 



273. 



• Sevier Lake. 



274. 



Shale. 



275. 



Shaler. N. S. 



276. 



Sierra Nevada. 



277. 



Silurian period. 



278. 



Sink hole. 



279. 



Surveys, geological. 



280. 



Ta conic system. 





Johnson's Cyclopedia, volume 8. 



281. 



Taylor, Mount. 



2.82. 



Terrace. 



2.83. 



Tertiary era. 



2.84. 



Triassic period. 



285. 



Valleys. 



286. 



Vannxom, Lardner. 



287. 



Vesuvius. 



288. 



Volcanoes. 



289. 



Walcott, C. D. 



290. 



Watkins Glen. 



291. 



Wliittle.sey, Charles. 



292. 



Williams, H. S. 



293. 



Woodward. R. S. 



Articles as follows : 



Articles as follows: 



1896 



294. The Algonfjuin Itivcr. .\in«Mican Geologist, volume 18, page 231. Ab- 

 stract presented to Geological Society of America at Buffalo. August. 



