482 



INDEX 



Bacteria, disease-producing, 196-198 



freezing of, no 



growth of, 110-112 



infection, 199 



killed by boiling, 113-115 



killed by chemicals, 115-117, 200-201 



killed by sunlight, 199-200, 267-268 

 Baking powders, 150-152 

 Baking soda, 149-150 



and bread making, 149 



and Seidlitz powders, 152 



and soda mint, 152 



used with acids, 150-151 



See Sodium bicarbonate 

 Banana, chemical substitute for, 102 

 Bark, 450-452 

 Barograph, 383 

 Barometer, 380-383 



aneroid, 380 



mercurial, 380 



uses of, 382-383 

 Bases, 140-142 

 Battery, electric, 210 

 Beer, 155 



Bees, carriers of pollen, 426 

 Bell, electric, 218-220 

 Benzine, preparation of, 125-126 



to remove grease, 146 



to remove paint, 146-147 

 Benzoate of soda, 116 

 Benzoic acid, 116 

 Bicarbonate of soda. See Baking soda ; 



Sodium bicarbonate 

 Bile, 95 



Birds, 464-465, 478 

 Bituminous coal, 120 



heating power of, 128 

 Bleaching, 158-164 



chlorine, 159-161 



commercial, 161-164 



powder, 160-161 



sulphurous acid, 162-163 

 Block and tackle, 303 

 Blueing, 163-165 



iron stains from, 165 



Boiling, 37 



Boiling point, of alcohol, 38 



of brine, 38 



of water, 19, 37 

 Bomb calorimeter, 68 

 Bone black, 63 

 Borax, 146, 147 

 Boric acid, 116 

 Bread, 153-154 

 Breathing, 54-56 



of plants, 444 

 Breezes, 35-36, 401-404 

 Brick oven, 29-30 

 Briquettes, 122 

 Bronze, 178-179 

 Building stones, 417-422 

 Bulbs, electric, 213 



flower, 430-431 

 Burners, gas, 277-278 

 Burns, treatment of, 57 

 Butter, 99-100 



flavor and bacteria, loc 



substitutes, 100, 101 



Cactus, 351 

 Calorie, 33-34, 67 

 Calorimeter, 68 

 Cambium, 451, 452 

 Camera, 264-265 

 Camphor, 459 

 Camping, 326, 327 

 Candies, 98 



Candle, 240-242, 275-276 

 Candle power, 241 

 Canning, 114-115 

 Canons, 371 

 Carbohydrates, 70-71 

 Carbolic acid, 200-201 

 Carbon, charcoal, 62-64 



graphite, 120 



in electric cell, 208-209 



in pig iron, 175 



in steel, 175 



occurrence, 61-62 

 Carbona, 146 



