156 



MECHANICS 



Experiment 65. *Making a Balance and Weighing. 



Apparatus: Hammer, saw, plane, bit-stock, bits 

 y%" and *4", sandpaper, file, pair of pincers, set of 

 weights (French system). 



Materials: Soft pine board %" thick, 12" long and 



* Adapted from Farmers' Bulletin 408. U. S. Dept. of Agriculture 

 Cut supplied through United States Department of Agriculture. 



