(Study pages 111-122)

Chemical Formulas

Reference: "Chemistry of Cooking and Cleaning, " by Richards and Elliott. Pages 9-30. ($1.00, postage 10c

" Elementary Chemistry. " Text book of American School of Correspondence. (Postage 4c.)

Housekeepers' Laboratory

Make some of the tests described.

Reference: "Some Forms of Food Adulteration and Simple Methods for their Detection. " Bulletin No. 100, Bureau of Chemistry, U. S. Department of Agriculture. Send 10c. (coin) to the Supt of Documents, Washington, D. C.

(Send answers to Test Questions on Part III and report on supplemental work.)