PHOTOGRAPHS DONATED BY U. S. GEOLOGICAL SURVEY. 385 



1327 (9). Mountains north of the San Miguel river near Telluride, Colorado. The 



lighter colored band of strata belong to an Eocene (?) conglomerate. 

 Above it 2,500 feet of andesitic tuff and bedded breccia. Forms 

 panorama with number 10. 



1328 (10). Mountains north of%the San Miguel river near Telluride, Colorado. 



Dallas peak (13,700 feet). Forms panorama with number 9. 



1329 (15). Mount Sneffels, San Juan mountains, Colorado (14,000 feet). A great 



diorite and gabbro mass cutting up through andesitic tuffs and 

 breccias. Tertiary. 



1330 (28). A characteristic cliff of fine grained andesitic tuff. Bridal Veil basin, 



near Telluride, Colorado. 



1331 (31). South Lookout peak near Ophir, San Juan mountains, Colorado. 



Characteristic cliffs and pinnacles of coarse, bedded, andesitic breccia 

 and tuff. 



1332 (35). Iron spring near Ophir, Colorado. The spring has built up a terrace of 



reddish, sinter-like materials, as about the Yellowstone hot springs. 



1333 (40). The Twin Sisters peaks, San Juan mountains, Colorado. Jurassic 



strata form smooth slopes of middle ground ; an Eocene (?) con- 

 glomerate, the cliff next above ; Tertiary tuffs the peaks proper. 

 Forms panorama with number 41. 



1334 (41). East of Twin Sisters peaks (forming panorama with number 40). 



Triassic conglomerate causes cliffs of foreground. Eocene (?) con- 

 glomerate lies unconformably on Cretaceous, Jurassic, and Triassic 

 strata on further side of central valley. 



1335 (48). Vermillion peak, San Juan mountains, Colorado (13,700 feet). Typical 



cliffs of bedded breccias and tuffs. Rhyolite flows cause summit 

 cliffs. 



Seventeen views photographed and presented by J. P. Bishop, 109 Norwood Avenue, 



Buffalo, New York 



Size, 4 J by 7 } inches 



1336. Setting-tank for brine, Kerr salt works, Rock Glen, New York. 



1337. Works of Warsaw Salt Company, Warsaw, New York. 



1338. Salt pan, Genesee salt works, Biffard, New York. 



1339. Kettles with steam jacket, Standard works, Warsaw, New York. 



1340. Grainer process, Perry salt Works, Perry, New York. 



1341. Barreling salt, Castile, New York. 



1342. Bagging salt, Castile, New York. 



1343. Group of salt packers, Castile, New York. 



1344. Bucket for hoisting. Salt mine, Griegsville, New York. 



1345. Breaker, Retsof salt mine, Griegsville, New York. 



1346. Pile of salt "culm," Retsof mine, Griegsville, New York. 



1347. Exterior of salt-block, Syracuse, New York. 



1348. Interior of same showing kettles. 



1349. Solar salt works, Syracuse, New York. 



1350. Draining salt, Solar salt works, Syracuse, New York. 



1351. Carting salt, Solar salt works, Syracuse, New York. 



1352. Deserted salt w r orks, Syracuse, New York. 



