4 8 4 



INDEX 



Combustion, 50 



spontaneous, 56-57 

 Compass, 225 

 Compressed yeast, 157 

 Concrete, 421-422 

 Condensation, 38-39 

 Conduction, of electricity, 22O 



of heat, 28-29 



through metals, 29 

 Cone, volcano, 414 

 Conifers, 454-455 

 Conservation, of energy, 65-68 



of forests, 346 



of matter, 65 

 Constipation, 77 

 Contraction, 13-17 

 Convection, 28, 40 

 Cooking, economy of, 37-38 



effect on food, 84-90 



of meats, 84-86 



of vegetables, 87-89 



roasting, 85-86 



stewing, 86 



with gas, 127-128 

 Cooking utensils, 176, 177, 179 

 Cooling, by evaporation, 41-42, ill 

 Copper, effect of acid on, 176 



effect of moisture on, 176 



modern use of, 176 



primitive use of, 175 



use in alloys, 179 

 Corn sirup, 97-98 



Corrosive sublimate, disinfectant, 200 

 Cost, of food, 77-79 



of fuel, 128 

 Cotton, 129-133 



as adulterant, 135-136 



dyeing, 169 



fibers, 129-132 



mercerized, 138 



mixed goods, 134-135 

 Cottonseed oil, 101 

 Cotyledons, 436, 437 

 Cow, 460-461 

 Crane, traveling, 306 



Crater, 414 



Cream of tartar, 150-151 

 Creosote oil, 185 

 Cross-breeding, 428 

 Crystalline lens, 258-259 

 Cultivated plants, 433-434 

 Currents, air, 35-36, 401-404 

 ocean, 28 



Damper, 22-23 



Day, length of, 396-398 



Decay by bacteria, io8-lll 



Deciduous plants, 455456 



Deltas, 366-367 



Desert, how caused, 348 



reclamation of, 353-356 



vegetation of, 350-352 

 Destructive distillation, 64-65 



of soft coal, 1 20 

 Dew, 42 

 Dew point, 43 

 Diet, 67-81 



carbohydrates, 70 



fats, 71 



proteins, 71-72 



variety in, 80 



water in, 73 



See Food 

 Digestion, 91-96 



alimentary canal, 91-9* 



in intestines, 95-96 



in mouth, 92-93 



in stomach, 92-95 

 Diphtheria, 205-206 

 Disinfection, 200-202 

 Distillation, 40-41, 64-65 



commercial, 41 



destructive, 64-65 



of petroleum, 124-126 



of soft coal, 120, 126-127 



of turpentine, 41 



of water, 40-41 

 Domestic animals, 460-465 

 Double boiler, 87 

 Drainage, 324-325 



