SCIENCE OF THRESHING. 173 



PAGE 



TRACTION WHEELS 



Diameter of -. . 137 



TOOL Box- 

 Importance of 72 



VALVES 



Description of 128, 129, 130 



Keeping True 125 



Lubrication of 125 



Pressure on 125 



Setting 134, 135 



Slide 124, 128 



WAGON LOADER 42 



WASTING GRAIN 



Amount of 7 8, 79 



Reasons for 52, 53 



WATER 



Changed to steam by heat 90 



Expansion of by heat 85 



In boiler 119 



WEATHER, INFLUENCE OF 47 



WEIGHERS 42 



WHEELS, DRIVE 137 



WHEAT 



Cleaning weedy 62 



Spring 55 



WHISTLE 



Code of Signals 138, 139 



How to sound 139 



Tone of 139 



WIND STACKER 



Horse power required 40, 41, 42 



