456 



INDEX. 



HULBURT, CLINTON H., and BACON, R. 

 F., A Liquid Concave Mirror, 19. 



Hydrocarbons, unsaturated, in crude petro- 

 leum, 5. 



Hydrogen, aniline in dry, 430 ; atom, labile, 

 423. > 



Hydrogen and chlorine, as chemical pho- 

 tometers, 282. 



Hydrogen and moisture, aniline in, 430. 



Hydrogen peroxide, as essential in reactions 

 of sunlight, 271. 



Hypersthene, 320. 



IDDINGS, JOSEPH P., The Petrography of 



Some Igneous Rocks of the Philippines, 



155. 

 Igneous rocks, of southwestern Luzon, 66 ; 



of the Philippines, 155. 

 Ilocos Norte, phosphate found in, 333. 

 Indian curry, turmeric in, 442. 

 Indian yellow, 443. 

 Indigo, a natural Philippine dye, 439 ; blue, 



a fast color, 441. 

 Indigofera tinctoria L., 441 ; I. suffruticosa 



Mill., 441. 

 Intermediate uplands of Philippine Islands, 



311 ; of Mindanao, 352. 

 Intermontane plains, of Philippine Islands, 



location of, 309. 

 Intsia bijuga O. Ktze., 440. 

 Ions, influence of, upon clouds, 271. 

 Iron, in southwestern Luzon, 105. 

 Island of Jolo, chief products of, 361. 



J 



Jamaica ginger, 259 ; price per pound of 

 unbleached, 260. 



K 



Kamela, 444. 



Khaki dyes, 447. 



Koettstorfer number, increase in, of Manila 



copal, caused by autoxidation, 224. 

 Kulingtang Range, 358. 



Labile hydrogen atom, 423. 



Labor, necessary in manufacture of paper 

 pulp, 244. 



Laguna Province, clay in, 334. 



Lagunum (?), 328. 



La Laguna, basaltic rocks from, 140. 



Lake Bay, origin of, 103. 



Lake Lanao, 356 ; upland of, 352. 



Lake Mainit, 357. 



Lake Taal, origin of, 101. 



Lakes, in Mindanao : Liguasan and Buluan, 

 356 ; Linao and Kadagan, 356 ; Munay, 

 Dapao and Nonungan, 357. 



Lalang, chemical analysis of, 253 ; identical 

 with cogon, 252 ; preparation of paper 

 from, 254 ; possible use of, in paper pulp 

 manufacture, 252 ; process of prepara- 

 tion, 253. 



j Lard, effect of coconut oil on, 36 ; effect of 

 ' . wheat bran on, 34 ; from wild and domestic 

 hogs, 33 ; influence of fish meal on, 34 ; 

 influence of tropical climate on, 43. 

 j Lawsonia alba Lam., 443. 

 ! Lead and zinc in Philippine Islands, 332. 



Lepidocyclina, 327. 

 ! Lepidocyclina richthofeni Smith, 328. 

 I Leucitites, 321. 

 ! Leyte, oil seeps in, 333. 

 Library, of the Bureau of Science, 45. 

 Light, influence of, in presence of oxygen, 9. 

 Liquid concave mirror, apparatus for obtain- 

 ing, 19. 

 Liquors, distilled, 23, 29. 

 Lime, free, in Portland cement, 369 ; in 

 southwestern Luzon, 112 ; sintered, 383 ; 

 nonsintered, slaking of, 390 ; fused, 390. 

 Limestones, 325 ; in southwestern Luzon, 68. 

 Limonene, in Manila copal, 205, 207. 

 Linseed oil, as a solvent .for heated copals, 



213. 

 Lithothamnium, 327. 

 Loboo Mountains, 62. 



Log of well, at Pasay, Rizal Province, 310. 

 Logwood, a natural dye, 439. 

 Lokai'n, a green color, 441. 

 Los Bafios, mineral waters of, 334. 

 Lucina sp., 328. 

 Lucina (Codakia) semperiana (?) Issel., 



328. 

 Luzon, central plain of southwestern, 61 ; 

 eastern cordillera of southwestern, 61 ; 

 geological reconnaissance of southwestern, 

 57 ; gold on, 331 ; physiographic regions 

 of southwestern, 59 ; southwestern vol- 

 canic region of, 62 ; western cordillera 

 of southwestern, 61. 



M 



Macaranga tanarius Muell.-Arg., 445. 



Macoma rosareana Smith, 328. 



Madder colors, 440. 



Madracis sp., 328. 



Mahonia nepalensis DC, 441, 442. 



Malachite green, a coal-tar color, 440. 



Mallotus philippinensis Muell.-Arg., 444. 



Manganese oxide, in Ilocos Norte, 332. 



Manila, concrete construction in, and the 

 Philippine Islands, 117. 



Manila copal, 172, 177 ; action of heat upon, 

 198 ; amount of carbon dioxide given off 

 by, 208 ; behavior of, in some of the 

 common solvents, 216 ; botanical origin 

 of, 178 ; changes in, when fused in open 

 receptacle over a free flame, 194 ; chem- 

 ical examination of, 182 ; color of, 182 ; 

 commercial grading of, 182 ; commercial 

 uses of, 182 ; early commerce in, 179 ; 

 effect of heating, on its solubility in oils, 

 212 ; evolution of carbon dioxide from, 

 220 ; forms copal oil by decomposition, 

 213 ; gases given off by, during distilla- 

 tion, 207 : geographical origin of, 177 ; 

 influence of sunlight on absorption of 



