PRINCIPLES OF MACHINES 477 



studied and rigorously followed. The wood and iron parts 

 of an implement should be kept thoroughly clean at all 

 times. When the implements are not in use, the polished 

 surfaces should be rubbed until dry and coated with heavy 

 grease or oil to prevent rusting. They should then be placed 

 under cover. If they are not dry when the grease is applied, 

 they will rust under the coating. When a machine is placed 

 in the shed at the end of the season, a tag should be tied to 

 it showing the repairs needed. In the slack period during 

 the winter the repairs should be ordered and the implement 

 put in shape before the busy season begins. 



