INDEX 



Absorption, of heat by lampblack, 

 143-144. 



of gases by charcoal, 57. 



of light waves, 135-138. 

 Accommodation of the eye, 123. 

 Acetanilid, 259. 

 Acetylene, as illuminant, 152-153. 



manufacture of, 152-153. 



properties of, 220. 

 Acid, boric, 253. 



carbolic, 152, 251, 252. 



hydrochloric, 55, 80, 227, 238, 241. 



lactic, 230. 



oxalic, 247, 248. 



salicylic, 253. 



sulphuric, 55, 80, 240, 241, 307. 



Sulphurous, 242. 

 Acids, action on litmus, 220. 

 Adenoids, 51. 



Adulterants, detection of, 16. 

 Air, characteristics of, 81-83, 86, 189. 



compressibility of, 91. 



expansion of, 10-11. 



humidity, 38, 39. 



pumps, 201-205. 



transmits sound, 269. 



weight of, 86. 



See Atmosphere. 

 Alcohol, 234. 



in patent medicines, 260. 

 Alizarin, 248. 

 Alkali, 222. 



Alternating current, 351. 

 Alum, 247. 



in baking powder, 230. 

 Ammeter, 341, 343. 

 Ammonia, 152. 



a base, 221-222. 



in bath, 226. 



in manufacture of ice, 98. 



neutralizing chlorine, 240. 

 Ampere, 342. 



CL. GEN. SCI. 2 A 



Anemia, 259. 



Angle, of incidence, 110. 



of reflection, 110. 



of refraction, 114. 

 Aniline, 152, 245. 

 Animal charcoal, 58. 

 Animal transportation, 132. 

 Antichlor, 240. 

 Antipyrin, 259. 

 Armature, 319, 320. 



dynamo, 350. 



motor, 335. 



Artificial lighting, 148-153. 

 Atmosphere, 81. 



carbon dioxide in, 54-55. 



height of, 81. 



nitrogen and oxygen in, 262. 



pressure of, 82-86. 



water vapor in, 36-38. 



weight, 86. 



See Air. 



Atmospheric pressure, 82-86 

 Atomizer, 92. 

 Atoms, 102. 



Automobiles, gas engines, 185. 

 Axis of a lens, 119. 



Bacteria, 133. 



as nitrogen makers, 263. 



destroyed by sunlight, etc., 133, 250, 

 251. 



diseases caused by, 133. 



in butter and cheese, 133 

 Baking powder, 229-230. 

 Baking soda, 227-229. 

 Barograph, 87. 

 Barometer, aneroid, 84-85. 



mercury, 84. 



use in weather predictions, 86-87. 

 Bases, action on litmus, 221-222. 



properties, 220-222. 

 Battery, electric, 311. 



353 



