SCIENCE OF THRESHING. 73 



put in its proper place and all nuts gone over and 

 tightened. It is very good practice to leave each nut 

 standing square with the piece on which it rests; 

 this not only gives the machine a symmetrical and 

 workmanlike look, but it accustoms the eye to seeing 

 the nuts stand squarely, so that it readily detects any 

 change in position due to loosening, and thereby 

 allows of instant attention, preventing loss. Remove 

 all cinders and dirt from the boxes and running parts 

 and pack them with waste, as before stated, to 

 exclude all foreign substances. Finally, before assem- 

 bling the crew, run the machine empty for a time to 

 see that all the parts are properly adjusted; this 

 gives a chance also to adjust the belts, which when 

 new, stretch after being run a short time. 



