xii Experiments and Exercises 



PAGE 



Test for Protein 357 



Test for Fats and Oils 357 



Test for Water 357 



Test for Mineral Matter 357 



Test for Acid or Alkaline Substance 357 



The Mouth Cavity 405 



Uses of Teeth, Tongue, and Cheeks in Eating 405 



Digestion of Starch , 405 



Digestion of Protein 406 



Digestion of Fat 406 



Rate of Pulse and Cause of Variation 421 



Circulation of Blood in a Frog's Foot 421 



Presence of Bacteria and Molds in Air 441 



Presence of Bacteria in Milk 442 



Presence of Molds in Bread 442 



Presence of Bacteria and Molds in Water 442 



Presence of Bacteria on the Teeth. . . 443 



Conditions Favorable to the Growth of Bacteria 443 



Nature and Effects of Pasteurization 469 



Plant Cells . 491 



Oxidization in Living Things 494 



Principle of Osmosis 495 



The Course of Soil Water in a Root 496 



Relation of Light to Starch-making in Green Leaves 500 



Examination of a Bean 506 



Examination of Corn Grains 506 



Necessity of Oxygen for Germination 508 



Necessity of Heat and Moisture for Germination 509 



Production of Carbon Dioxide in Germination 509 



Production of Heat in Germination 510 



Necessity for Stored Food in the Seed 510 



Digestion of Starch During Germination 510 



Selecting and Testing Seeds 511 



Response of Roots to Gravity 511 



Response of Roots to Moisture 511 



Response of Stems to Light 511 



