INDEX. 



459 



Rhodainine, a coal-tar color, 440. 



RICHMOND, GEORGE P., Manila Copal, 

 177 ; Philippine Fibers and Fibrous Sub- 

 stances : Their Suitability for Paper 

 Making, 233 ; Tayabas Petroleum, 1. 



Rivers, small, of Mindanao, 349. 



Rock, basaltic, from La Laguna, 140. 



Rocks, igneous, of the Philippines, 155 ; of 

 the volcanic mountains, 155. 



Rostellarea javana Mart., 328. 



Rye whiskey, 23. 



S 



Safflower, 442. 



Sahug-Tagum system, in Mindanao, 349. 



Salt, found in Philippine Islands, 333 ; in 

 southwestern Luzon, 112. 



Salts, uranium, as a chemical photometer, 

 281. 



Salty springs, in Mountain Province, Luzon, 

 333. 



Sand, used in concrete construction, 118 ; 

 in southwestern Luzon, 111. 



Sandstones and conglomerates, 325. 



Sandstones of southwestern Luzon, 79. 



Sappan wood, 447. 



Schists, of southwestern Luzon, 75. 



Sehizotachyum mucronatum Hack., 237. 



Scotch whiskey, 23. 



Sedimentaries, of southwestern Luzon, 66. 



Sedimentary rocks, 324. 



Semele ( ?) dalli Smith, 328. 



Septaria arenaria Lam., 328. 



Shales, of southwestern Luzon, 79. 



Shales and clays, 325. 



Shore features of Mindanao, 359. 



Sibul springs, mineral waters of, 334. 



Silk, used in manufacture of Philippine 

 textiles, 439. 



Silver, in the Philippine Islands, 331. 



Sintered lime, 383. 



Sisiman andesite, 109. 



Sisiman rock concrete, 124. 



Small rivers, of Mindanao, 349. 



SMITH, WARREN D., The Essential Feature 

 of the Geology of the Philippine Islands, 

 307 ; Geologic Reconnaissance of Minda- 

 nao and Sulu : II. Physiography, 345. 



Soils, of the Philippine Islands, 334 ; classifi- 

 cation of, 334. 



Specifications, concrete, 135. 



Stephanoccenia sp., 328. 



Stone, Guadalupe and Meycauayan, in south- 

 western Luzon, 109. 



Stratigraphy, of the Philippine Islands, 314. 



Strombus javanus Mart. var. semperi Sm., 

 329. 



Sulphur, in the Philippine Islands, 333. 



Sulu, geologic reconnaissance of, 345 ; vul- 

 canism in, 360. 



Sun actinic power of, 292. 



Sunlight, action of, on oxalic acid-uranium 

 mixture, 300 ; causes red color of aniline, 

 11 ; effect of, in the absence of oxygen 

 and oxidizing influences, 419 ; influence 

 of, on absorption of oxygen by Manila 

 copal, 226 ; preliminary study of, 267. 



Syenite, 324. 



Synthetic dyes, 440 ; action of light on 



natural and, 440. 

 Synthetic oils, 263. 



Taal Lake, origin of, 101. 



Taal volcano, 64, 313 ; origin and age of, 

 314. 



Tagelus coartatus Gmelin, 329 ; T. coribaeus 

 (?) Lam., 329. 



Tannin, 445. 



Tapes lobooensis Smith, 329. 



Tapioca and coconuts, chief products of Jolo, 

 361. 



Tarlac sand, 120. 



Tayabas oil seeps, 333. 



Tayabas petroleum, 1. 



Tellina plicata (?) Valene, 329. 



Teridina annulata ( ?) Bttg., 329. 



Terminalia nitens Presl., 445 ; T. catappa L., 

 445. 



Terpenes, Philippine, 257. 



Terraces, of Mindanao, 359. 



Tertiary limestones, of southwestern Luzon, 

 79. 



Thespesia lampas D. & G., 443. 



Tiruray tableland, 352. 



Toddalia aculeata Pers., 442. 



Tree, the almaciga, 173. 



Tritonidia ventricosa Mart., 329. 



Trochus sp., 329. 



Tropical sunlight, apparatus used in ex- 

 periments on, 267 ; preliminary study of, 

 etc., 267. 



Tufaceous foraminiferal marls, of south- 

 western Luzon, 71. 



Tuff formation, of southwestern Luzon, 95. 



Tuffs, 325. 



Tumaga River, in Mindanao, 350. 



Turbo borneensis Bttg., 329 ; T. nivosus 

 Reeve, 329. 



Turicula jonkeri Mart., 329. 



Turmeric, a yellow color, 442 ; not exported 

 from Philippines, 442 ; value of importa- 

 tions of, into United States in 1907, 442. 



Turpentine, and rosin, preparation of, from 

 resin of Pinus insularls Endl., 229. 



Turritella cingulifera Sow., 329 ; T. terebra 

 Lam., 329. 



u 



Ultra-violet light, ionizes gases, 269. 

 Ultra-violet spectrum, rays of, absorbed by 



oxalic acid solutions, 283. 

 Uranium salts, as a chemical photometer, 



281. 



V 



Valley of the Agusan River, 349. 



Varnish, cooking of, 192 ; manufacture of 

 resin into, 203 ; oleoresinous, 191. 



Venus pulcherrima ( ?) Mart., 329 ; V. squa- 

 mosa Lam., 329. 



Vermetus junghuhni Mart., 329. 



Vicarya callosa Jenk. var. semperi Sm., 329. 



