Experiment 65. Cooking . and testing 

 starch. 



68. Sugar. 



a. Sources. 



b. Test. 



Experiment 64. Testing far sugar.. 



69. Proteids. 



a. Sources. 



b. Cookings 



c. Test. 



Experiment 65. Cooking- and testing" 

 proteidsv 



70. Fats. 



a. Sources. 



b. Test. 



Experiment 66. Testing for fats'. 



71. Digestion of food. 



Experiment 67. The digestion of a pro- 



teid. 



(This subject, Food, is continued in the work 

 for the eighth grade.) 



MECHANICS. VII. 



72. A brief summary of the facts stated under the 

 same topic in the work for the fifth and sixth grades. 



73. The pendulum. 



a. The compound pendulum used in clocks. 

 (See Section 97.) 



74. Vibrations. 



a. Eorced. 



b. Sympathetic dangerous for buildings. 



Experiment 68. Forced and sympathietic 

 vibrations. 



75. Reaction. 



