SCIENCE OF THRESHING. 169 



PAGE 



POWER 49 



PULLEYS, CROWNED 67 



PUMPS 



Kinds of . . . 107 



Leaks . . 109 



Operation of 107, 108, 109 



Parts of 107 



PRIMING 117 



RACK 



Combination 31 



Forms of 27 



Length of stroke 29 



Motion of 28, 29 



RADDLES 



Combination of 31 



Construction of 30 



Motion of 30 



REVERSE LEVER 143 



RUST 51 



RYE, SEPARATING 51 



STACKERS 42 



SAFETY VALVE 



Area of .'...112 



Description of 112 



Rules for are 112 



SCALE, EFFECTS OF 116, 119 



SELF FEEDER 



Explanation of 44 



Governor for 45 



Office of 45 



