No. 112.) 



133 



Every platform on which the horses tread was elevated to form 

 an angle of 13 degrees with a level base line; two men whose 

 weights were ascertained, were placed on the platform, and the 

 number of revolutions of the driving wheel derived from their 

 gravity was ascertained by the speedometer ; the length of plat- 

 form required to make one revolution of the driver was carefully 

 measured. From these data the length of platform passed over 

 by the men in one minute was readily obtained, and with the 

 length of the platform and two angles being known, the elevation 

 attained by the men in one minute, walking on the platform, was 

 ascertained; or in other words, the heighth of a perpendicular 

 line in the direction of which a weight would be raised, by a given 

 power on an inclined plane. 



With these facts carefully obtained and noted, the following 

 lesults were ascertained, and are here exhibited in tabular form : 



A second trial was made with these machines, placing six men 

 on the platform, whose aggregate weight was 925 pounds. The 

 thrashing machines were attached to the powers, and the follow* 

 ing results obtained. 



EXHIBITORS. 



Emory «i. Co.,. 

 Wcstinghoase, 



Pitts, 



Badger, 



So t« 

 ei o 



*- c c a> 



'^ 5 "^ "O 



o "^ J- o 

 C o ^,o 



fill 



10 



7 

 14 



10 



M 

 to 



c 

 .a 



^a 



925 

 926 

 926 

 925 



