50 INDEX TO NORTH AMERICAN GEOLOGY, PALEONTOLOGY, [bull. 189. 
Chemical analyses— Continued. 
Pyroxene, Winchell, 6277. 
Pyroxenite, Clarke and Hillebrand, 925. 
Pyroxenite, Diller, 1507. 
Pyroxenite, Kemp, 2993. 
Pyroxene-andesite, Clarke and Hillebrand, 
925. 
Pyroxene-mica-diorite, Clarke and Hille- 
brand, 925. 
Pyroxene-schist, Clarke and Hillebrand, 925. 
Quartz-alunite rock, Clarke and Hillebrand, 
925. 
Quartz-alunite rock, Cross, 1191. 
Quartz-alunite rock, Turner, 5473. 
Quartz-amphibole diorite, Turner, 5473. 
Quartz-banakite, Ransome, 4540. 
Quartz-basalt, Diller, 1507. 
Quartz-diappore rock, Clarke and Hillebrand, 
925. 
Quartz-diaspore rock, Cross, 1191. 
Quartz-diorite, Turner, 5465. 
Quartzite, Bascom, 276. 
Quartzite, Clarke and Hillebrand, 925. 
Quartzite, Kemp, 2993. 
Quartz-mica-diorite, Clarke and Hillebrand, 
925. 
Quartz-monzonite, Cross and Spencer, 1206. 
Quartz-monzonite, Turner, 5481. 
Quartz-monzonite, Weed, 5948. 
Quartz-muscovite rock, Spurr, 5182. 
Quartz-norite-gneiss, Diller, 1507. 
Quartz-pantellerite, Lord, 3573. 
Quartz-pentallarite, Clarke and Hillebrand, 
925. 
Quartz-porphyry, Clarke and Hillebrand, 925. 
Quartz porphyry, Tower and Smith, 5445. 
Quartz porphyry, Turner, 5465. 
Quartz porphyry, Weed and Pirsson, 5935. 
Quartz-schist, Clarke and Hillebrand, 925. 
Quartz-syenite, Cushing, 1244. 
Quartz syenite, Weed and Pirsson, 5936. 
Quartz-syenite-porphyry, Washington, 5877. 
Quenstedtite, Kuntze, 3287. 
Residual rocks, Diller, 1507. 
Rhodolite, Hidden and Pratt, 2515. 
Rhyolite, Clarke and Hillebrand, 925. 
Rhyolite, Cross, 1191. 
Rhyolite, Diller, 1507. 
Rhyolite, Iddings, 2848. 
Rhyolite, Kemp, 2993. 
Rhyolite, Pirsson, 4408. 
Rhyolite, Smith, 5032, 5062. 
Rhyolite, Tower and Smith, 5445. 
Rhyolite, Turner, 5465. 
Rhyolite, Washington, 5876, 5877. 
Rhyolite, Weed and Pirsson, 5935. 
Rhyolite gneiss, Weidman, 5970. 
Rhyolitic obsidian, Diller, 1507. 
Rhyolitic perlite, Diller, 1507. 
Rhyolitic pumice, Diller, 1507. 
Rhyolitic tuff, Turner, 5472. 
Roscoelite, Clarke, 926. 
Roscoelite, Hillebrand, 2581, 2585. 
Salt, Veatch, 5746. 
Sandstone, Clarke and Hillebrand, 925. 
Sandstone, Diller, 1507. 
Sandstone, Hopkins, 2735, 2736, 2737. 
Chemical analyses — Continued. 
Sandstone, Kemp, 2993. 
Sandstone, Prosser and Cumings, 4494. 
Sanidine, Diller, 1507. 
Sanidine-bearing andesite, Ransome, 4540. 
Saussuritegabbro, Clarke and Hillebrand, 925. 
Saxonite, Diller, 1507. 
Saxonite, Hall, 2251. 
Scapolite, Spurr, 5181. 
Scheelite, Hoffmann, 2659a. 
Schefferite, Wolff, 6418. 
Schist, Becker, 345. 
Schist, Kemp, 2993. 
Schist, Van Hise and Bayley, 5704. 
Sericite-schist, Clarke and Hillebrand, 925. 
Sericite-schist, Nitze, 4107. 
Serpentine, Clarke and Hillebrand, 925. 
Serpentine, Diller, 1507. 
Serpentine, Kemp, 2993. 
Serpentine, Merrill, 395.). 
Serpentine, Turner, 5472. 
Shale, Calvin and Bain, 720. 
Shale, Clarke and Hillebrand, 925. 
Shale, Diller, 1507. 
Shale, Gilbert, 2005. 
Shonkinite, Clarke and Hillebrand, 925. 
Shonkinite, Pirsson, 4408. 
Shonkinite, Washington, 5880. 
Shonkinite, Weed and Pirsson, 5936, 5938. 
Shoshonite, Clarke and Hillebrand, 925. 
Shoshonite, Iddings, 2847. 
Silicoferrolyte, Winchell, 6277. 
Silver ore, Emmons, 1705. 
Silver ore, Porter, 4417. 
Sinter, Emmons, 1705. 
Slate, Clarke and Hillebrand, 925. 
Slate, Clements, 1016. 
Slate, Dale, 1256. 
Slate, Diller, 1507. 
Slate, Duden, 155 1 
Slate, Hillebrand, 2580. 
Slate, Kemp, 2993. 
Slate, Mathews, 3737. 
Smithsonite, Warren, 5864. 
Soapstone, Kemp, 2993. 
Socorro tripoli, Herrick, 2456. 
Soda, Knapp, 3197. 
Soda, Knight, 3210, 
Soda feldspar dike rock, Turner, 5465. 
Soda-granite, Clarke and Hillebrand, 925. 
Soda-granite porphyry, Turner, 5466. 
Sodalite, Clarke and Hillebrand, 925. 
Sodalite, Diller, 1507. 
Soda-syenite, Turner, 5480. 
Sodium carbonate, Knapp, 3198. 
Solvsbergite, Washington, 5872, 5875, 5877. 
Sperrylite, Walker, 5824. 
Spherulite, Clarke and Hillebrand, 925. 
Spilosite, Clarke and Hillebrand, 925. 
Spilosites, Clements, 1016. 
Stalactite, Hillebrand, 316. 
Sulphohalite, Penfield, 43, 25. 
Syenite, Becker, 345. 
Syenite, Clarke and Hillebrand, 925. 
Syenite, Cross, 1191. 
Syenite, Cushing, 1246. 
Syenite, Diller, 1507. 
