INDEX 



[The references are to pages.] 



Absolute cold, 86. 



Absorption of light waves, 111, 

 127, 128. 



Acids, 183, 184 ; fatty, 208. 



Adhesion, 12. 



Air, composition of, 210 ; com- 

 pressed, 43; dome, 39; lique- 

 fied, 86 ; pump, 42. 



Alcohol, 190, 208. 



Alkalis, 184, 190, 208. 



Alloys, 188. 



Alternating current, 158. 



Alum, 201. 



Aluminium, 201. 



Amalgam, 190. 



Ammonia, 85, 205. 



Ampere, 146. 



Aniline dyes, 217. 



Annealing, 13. 



Anthracite, 215. 



Arc, electric, 168 ; lamp, 168 ; of 

 pendulum, 58. 



Armature, of dynamo, 156 ; of 

 motor, 162. 



Artificial, cold, 84 ; ice, 85. 



Atmospheric pressure, 32, 33 ; 

 effects of, 34, 36-39. 



Atom, 176. 



Atomic theory, 176. 



Bacteria, 227, 229. 

 Balloons, 44, 194. 



Barometer, 36. 



Bases, 183, 184. 



Battery, 145 ; uses of current, 



146. 



Bell, electric, 166. 

 Bell, metal, 188. 

 Brass, 188. 

 Bread making, 228. 

 Brick, 212. 

 Brittleness, 13. 

 Bronze, 188. 

 Buoyancy, 26, 27 ; in gases, 44. 



Calcium, 199; compounds, 199. 



Camera, 122. 



Cane sugar, 207. 



Capillarity, 17. 



Carbohydrates, 189, 219. 



Carbon, 195, 215, 226; com- 

 pounds, 189, 204 ; dioxide, 195, 

 204, 210 ; monoxide, 205. 



Cars, electric, 163. 



Cells, dry, 143; gravity, 143; 

 . kinds of, 142 ; voltaic, 140, 

 141. 



Cellulose, 189, 206, 207, 213. 



Center, of gravity, 61, 52; of 

 mass, 52. 



Centigrade thermometer, 70. 



Centrifugal force, 55. 



Centripetal force, 55. 



Charges, electric, 133-137. 



231 



