652 



Index 



composition of matter, 22-33, 312 

 compound, 23, 30, 620 

 compressed air, 41-43, 82, 262 

 Compton, Arthur H., 574, 575, 



(574) 

 concave, 



glasses, 188-189 

 lens, 187, 188, 189 

 mirror, 185 

 conclusion, 9 

 concrete, 295-297, 620 

 roads, 256-257, (256) 

 condensation, 37, 121, 122, 125, 127, 



136, 620 



condenser, 206, 620 

 condiment-producing plants, 531- 



532 



conduction, 620 

 of electricity, 205 

 of heat, 102, 104, 109, 115 

 conductors, 620 



of electricity, 205, 207, 230 

 of heat, 104, 115 

 congestion, 346, 621 

 conjugation, 321, 621 

 connective tissue, 332, 342, 419, 431, 



621 

 conservation, 



of animal life, 49 



of energy, 16, 18, 20, 252-253, 340, 



621 



of forests, 516-521, (519) 

 of fuel, 93 



of matter, 15-16, 621 

 of nerve force, 435 

 constellations, 150, 161-164, 621, 



(161, 163) 



constipation, 412, 621 

 contagious diseases, 54, 58, 347, 

 360, 394, 448, 454-456, 458- 

 460, 466, 468, 471, 543, 552, 

 563 

 contraction, 



of matter, 82, 87 

 of mercury, 39-40, 86-87 

 of muscles, 331 

 of water, 87 

 control, or check, 62, 336, 406, 442- 



443, 508, 509, 510, 621 

 convection currents, 102, 103-104, 

 105, 107-109, 111, 112, 113, 115, 

 621, (103) 



convex, 



glasses, 188-189 



lens, 187, 188, 189 



mirror, 185 

 convolutions of brain, 431-432, 



(432) 

 cooking, 92, (371) 



methods of, 370-371 



purpose of, 369-371, 445 

 coordination, 423, 430, 621 

 copper, 28, 104, 205, 208, 230 

 cornea, 187-188, 621, (188) 

 corn seed, 506-508, (504) 

 corona, 151, 621 

 corpuscles, 621 



red, 316, 340-341, 364, 394, 396, 

 416-417, 637, (316, 341) 



white, 316, 341, 393, 396, 416-417, 



424, 455, 473, 645, (516, 341) 

 cosmic rays, 572, 574, 621 

 cotyledon, 497, 504-506, 621, (504, 



505, 507) 



cowpox, 456, 552, 563 

 crankshaft, 264-265 

 Crookes, Sir W., 575 

 crops, 



effect of water on, 48 



rotation of, 307, 638 

 Croton Reservoir, 55, (55) 

 cultivation of soil, 304, 305-307, 



493, 621 



culture mediums, 441, 621, (442) 

 cultures, 441, 541, 621, (442) 

 cumulus clouds, 125, 128, 621, (125) 

 Curie, Madame, 568-570, 575, (569) 

 Curie, Pierre, 568-570 

 current, 



air, 34, 121, 122, 131-134 



convection, 102, 103-104, 105, 107- 

 109, 111, 112, 113, 115, 621, 



electric, 18, 192, 203, 206, 208, 209- 

 211, 215, 219-226, 229, 231-233, 

 235, 237, 263, 266, 560, 582, 585, 

 587, 589, 590, 596, 621 



cuspid, 399, 621, (399) 



cusps, 154, 621 



cuticle, 426 



cuts, 482 



Cuvier, G. C. L. F. D., 575 



cycles, 236 



cyclone, 134, 135, 140, 145, 621 



