Hunter, _Laboratory Problems in Civic Biology._ American Book Company. Allen, _Civics and Health._ Ginn and Company. Bulletin 13, American School of Home Economics, Chicago. Cornell University Reading Course, Buls. 6 and 7, _Human Nutrition._ Davison, _The Human Body and Health._ American Book Company. Jordan, _The Principles of Human Nutrition._ The Macmillan Company. Kehler, L. F., _Habit-forming Agents._ Farmers' Bulletin 393, U. S. Dept. of Agri. Lusk, _Science and Nutrition._ W. B. Saunders Company. Norton, _Foods and Dietetics._ American School of Home Economics. Olsen, _Pure Foods._ Ginn and Company. Sharpe, _A Laboratory Manual for the Solution of Problems in Biology,_ pp. 226-240. American Book Company. Stiles, _Nutritional Physiology._ W. B. Saunders Company. _The Great American Fraud._ American Medical Association, Chicago. _The Propaganda for Reform in Proprietary Medicines._ Am. Medical Association. Farmers' Bulletin: numbers 23, 34, 42, 85, 93, 121, 128, 132, 142, 182, 249, 295, 298. Reprint from Yearbook, 1901, Atwater, _Dietaries in Public Institutions._ Reprint from Yearbook, 1902, Milner, _Cost of Food related to its Nutritive Value._ Experiment Station, Circular 46, Langworthy, _Functions and Uses of Food._ XX. DIGESTION AND ABSORPTION _Problems.--To determine where digestion takes place by examining_:-- _(a) The functions of glands._ -(b) The work done in the mouth._ -(c) The work done in the stomach._ -(d) The work done in the small intestine._ -(e) The function of the liver._ _To discover the absorbing apparatus and how it is used._ LABORATORY SUGGESTIONS _Demonstration of food tube of man_ (manikin).--Comparison with food tube of frog. Drawing (comparative) of food tube and digestive glands of frog and man. _Demonstration of simple gland._--(Microscopic preparation.) _Home experiment and laboratory demonstration._--The digestion of starch by saliva. Conditions favorable and unfavorable. _Demonstration experiment._--The digestion of proteins with artificial gastric juice. Conditions favorable and unfavorable. _Demonstration._--An emulsion as seen under the compound microscope. _Demonstration._--Emulsification of fats with artificial pancreatic fluid. Digestion of starch and protein with artificial pancreatic fluid. _Demonstration_ of "tripe" to show increase of surface of digestive tube. _Laboratory or home exercise._--Make a table showing the changes produced upon food substances by each digestive fluid, the reaction (acid or alkaline) of the fluid, when the fluid acts, and what results from its action.