376 



INDEX 



Blood, circulation of, 34 



pressure, 34 

 Bluing, laundry, 178 

 Board of Health, 43 

 Bodily wastes, 7, 174 

 Body, human, as a machine, 68, 72- 



73 



Boiling, 86-87 

 Brain, 9, 65-66, 72 

 Bread, 232, 325 

 Breathing, 5-6, 19-25 



artificial, 23-24 



effects on digestion, 22 

 Burns, treatment of, 235-236 

 Business success, 252-253, 293-295, 



298 

 Butter, and butter making, 342 



substitutes for butter, 272 



Caissons, 120 

 Calendar, 353, 362 

 Calorie, 95 

 Capillarity, 249 

 Carbohydrates, 27, 226-231 

 Carbon dioxide, 16, 18-19, 23, 190- 

 191, 194-195, 268 



monoxide, 17, 201 

 Casein, 301 

 Catarrh, 6 



Caves (caverns), 194 

 Cells in living bodies, 31, 64-65, 68, 

 71-72, 175 



effect of heat on, 27 

 Cellulose, 226-228, 231, 268, 273 

 Cement and concrete, 62-63, Z 9 2 

 Character, traits of, 8, 243, 252, 293- 



295 



Chemical changes, 173-179, 202 

 agencies in, 174-176 

 by electricity, 184-190 

 equations for, 179, 182, 184, 191 

 factors (and products) in, 182 

 ionization in, 181-182 



Chemical changes and radicals, 182 



valency in, 183-184 

 Chemical elements and compounds 



173-174, 197 

 Chemical formulae, 179, 181-184, 



191, 227 



Chest walls, 21-22 

 Chlorine, uses of, 175-176 

 Chlorophyll, 226, 314 



chloroplasts, 226-227, 268 

 Cisterns, 54-55 



Citizenship, duties of, 47, 245-246 

 Clay, 198, 247-248 

 Cleaning, 177-179 



dry cleaning of clothing, 177 

 Climate, 134-13? 



in relation to civilization, 135 



in relation to latent heat, 96 

 Clothing, 28-29, 209, 213, 272 

 Clouds, 90, 94, 138-140 

 Coal (and solar energy), 196-199, 



215-217 



Codling moth, 321-322 

 Coefficient of expansion, 141-142 

 Colds, 5, 28-29, 77 

 Color, 342-348 



in plumage of birds, 276 



selective absorption in, 343-344 

 Combustion, 16-18 

 Compressed air, 119-122 

 Condensation, 90-96 



heat from, 95-96 

 Congestion, n, 28, 34, 65 

 Conservation, of forests, 254-259 



of soils, 103-105, 255 



of well-being, 14, 210-213 

 Constipation, 7, 22 

 Consumers, 281-283 

 Corn, 312-317 



climate for, 313-314 



flowers of, 315 



products from, 316 



value of crop, 313, 31 7 

 Correlation of forces, 346 



