10 CONTENTS 



PROBLEM PAGE 



156. To determine some means of selection of fruit trees from the economic 



standpoint ........... 179 



157. How hybridization is accomplished in flowering plants . . . 180 



158. Other methods used in plant breeding 181 



159. To determine the working of Mendel's Law 181 



160. To determine some means of bettering, physically and mentally, the 



human race ........... 182 



161. .Are good mental parts or qualities capable of transmission from 



parent to child ? 183 



162. Does control of our environment have anything to do with the prob- 



lem of race betterment ? 183 



XVIII. THE HUMAN MACHINE AND ITS NEEDS . . 187 



163. To show that the human body is made up of cells .... 187 



164. To find out some functions of the skin. 188 



165. To study the use of the muscles 188 



166. To study the structure and uses of the skeleton ..... 189 



167. To find the relation of muscles to bones in the human body . . 190 



168. To study the joints of the human body ...... 190 



169. To get a preliminary survey of the internal structure of the human 



body . 190 



XIX. FOODS AND DIETARIES . . . . 194 



170. How to determine the nutritive value of food . . . . .195 



171. The use of the bomb calorimeter (Optional) . . . . .195 



172. To find the value of food as a tissue builder compared with its cost . 197 



173. To find the value of food as a source of energy compared with its price 198 



174. To find my daily Calorie requirement 202 



175. To find the proportion of protein, fat, and carbohydrate needed in 



my daily Calorie requirement ....... 203 



176. To obtain my daily dietary with the 100 Calorie table of Fisher and 



to make the necessary corrections in my dietary .... 204 



177. To compare your day's total Calories with the estimated needs of a 



person of your age doing the kind of work which you do . .211 



178. To find the relation of the value of food to its cost in the family 



dietary 211 



179. To study some forms of food adulteration and some means of detect- 



ing adulterants . . . . . . . . . .212 



180. To determine the effect of alcohol upon raw white of egg . . . 213 



181. To determine the amount of alcohol in some patent medicines . . 214 



182. To test for acetanilid and to know some patent medicines containing it 214 



183. What are the harmful materials formed in catarrh cures and soothing 



sirups? . , . 215 



