134 



(Assembly 



This test did not furnish a comparative value of the machines 

 as close as desirable ; for the thrashing machines attached to the 

 powers were of various sizes, with unequel momenta, nnd subject 

 to various degrees of friction. 



The committee endeavored to correct this source ot differeace, 

 at Utica, during the Fair, by testing each horse power with the 

 sa,me thrashing machine. Upon this occasion, five men, weigh- 

 ing in the aggregate 714 pounds, were placed on the platform, of 

 «ach machine, elevated as before to 13 degrees, and the follow- 

 ing comparative results were obtained : 



BXHIBITORS. 



Emery & Co., 

 Westinghouse, . 

 Badger, .... 



-a a 



O 



.2 bo . 



+j C —J 



259 

 217 

 360 



o o ^ 



g S fl a> 



o 



-a « 

 tijo 2 2 





^ a 



1-5 



5'^ 



lOi 

 10 





Cm 

 O 





714 

 714 

 714 



Mr, Pitts was not present at Utica with his machine. 



It is obvious from the foregoing tables, that*Badger°s machine 

 works wKh the least friction ; or, in other words, gravity gives to 

 his machine a greater amount of useful power than to either of 

 the other machines on trial, having the advantage in regard to 

 the revolutions of the cylinder of seven and a half per cent, over 

 Emery and Co., and a still greater advantage over Westinghouse. 

 In regard to the power exhibited by the weight descending the 

 platform, it appears that the same weight moved Badger's plat- 

 form 300 feet, and Emery & Co.'s 22 1 feet, the difiference (76 feet) 

 being 25J per cent in favor of Badger's power. 



Badger's power is well made, and in this respect deserves much 

 credit; yet in this excellence he is exceeded by Emery & Co. 

 The platform of Badger's horse power rolls over frictron wheels 

 of unusually large diameter. It is a rack and pinion power, the 

 lugs being connected by strong iron links, and the rack, though 

 straight, is provided with teeth increasing in depth as they ap- 

 proach the exterior edges of the pieces into which it is divided, 



