MECHANICS. VIII. 



66. A brief summary of the facts stated under the 

 same topic in the work for the fifth, sixth, and 



seventh grades. 



67. Work. 



a. Force acting through distance. 

 1). No gain in work by machines. 



Experiment 53. Work and machines. 

 69. Power. 



a. Work performed in a given time. 



b. Horse-power. 



Experiment 54. The work and power in 



climbing stairs or a hill. 

 Experiment 55. To find the power of a 



stream. 



69. Dams. 



a. Construction. 



b. Pressure against. 



Experiment 56. The shape of dams. 



70. The conservation of water-power. 



71. The strength of wooden beams. 



Experiment 57. The bending of beams. 



MAGNETISM AND ELECTRICITY. VIII. 



72. A brief summary of the facts stated under the 

 same topics in the work for the fifth, sixth, and 



seventh grades. 



73. The measurement of electricity. 



Experiment 58. How to make and use 

 a galvanometer. 



