Bomb calorimeter, 61.

    Borax, as meat preservative, 253.
      as washing powder, 226.

    Boric acid, as meat preservative, 253.

    Boyle’s law, 95-96.

    Bread, 232-233.
      unleavened, 233.

    Bread making, 232-235.

    Breathing, hygienic habits of, 50.
      by mouth, 50-51.

    Burns, treatment of, 52-53.

    Butter, adulteration test, 16.
      bacteria in, 133.

    Buttermilk, 230.

    Caisson, 203-204.

    Calcium carbide, 152-153.
      in making nitrogenous fertilizer, 264.

    Calico printing, 249.

    Calorie, 27-28, 61-62.

    Calorimeter, 61.

    Camera, 128-129.
      films, 129.
      lens, 129.
      plates, 129.

    Camping, water supply, 195-197.

    Candle, 148-149.
      as standard for light-measure, 104-105.

    Candle-power, 105-107.

    Carbide, calcium, 152-153, 264.

    Carbohydrates, 64-65, 149.

    Carbolic acid, 152.
      as disinfectant, 251.

    Carbon, 56, 66.
      in voltaic cells, 308.

    Carbon dioxide, 53.
      as fire extinguisher, 55-56.
      commercial use, 55-56.
      in baking soda, 228.
      in fermentation, 234.
      in health, 54.
      in plants, 55.
      preparation of, 55.
      source of, 53.
      test for, 228.

    Catarrh, 259.

    Caustic lime, 222..

    Caustic potash, 222.

    Caustic soda, 218, 222.
      to make a salt, 227.

    Caves and caverns, 71.

    Cell, dry, 310.
      gravity, 309-310.
      voltaic, 306-308, 310.

    Cells of human body, 63, 64, 66.

    Centigrade thermometer, 15.

    Central heating plant, 19.

    Chalk, in making carbon dioxide, 55.

    Charcoal as a filter, 57.
      commercially, 57.
      preparation, 57-58.

    Chemical action, and electricity, 307, 315-317.
      and light, 126, 127.

    Chemistry, in daily life, 218, 219.

    Chills, 38.

    Chloride of lime, in bleaching, 240.
      disinfectant, 251.

    Chlorine, and hydrogen, 239.
      effect upon human body, 239.
      in bleaching, 238-240.
      influence of light upon, 126.
      presence in salt, 227.

    Circuit, electric, 321.
      local, in telegraph, 325-326.

    City water supply, 206-212.

    Clarinet, 297.

    Cleaning of material, 226, 243.

    Climate, influenced by presence of water, 29, 40.

    Clover, nitrogen producers, 263.

    Coal, 30.

    Coal gas, 150, 151.
      by-products, 152.