19G 



MECHANICS. 



figure that tlie spindle is horizontal, and the face of the 

 stones vertical. The frame is of iron. The diameters of 

 the stones vary from sixteen to thirty inches, and the 

 weight from 400 to 1,500 lbs. The smaller size may be 

 run with a power of one to four horses ; the larger, with 

 that of ten to thirty horses. Prices $150 to $375. The 

 manufacturers claim that it will grind from one and a 

 lialf to three bushels per hour, for each horse-power used 

 in driving it. 



THE COTTON GIN. 



Since the invention of the Cotton Gin by Eli Whitney, 

 great improvements have been made, by which the cotton 

 is cleaned with great rapidity and in a perfect manner. 



Fig. 2^. 



Emery's Cotton GiiiSectwn. 



The machine manufactured by II. L. Emery, of Albany, 

 is one of the best for this pur^^osc. It is represented in 

 section in fig. 224. The hopper, at the light, is furnished 

 with what is termed a Picker Boll Svpportei\ which re- 

 volves within the hopper, in the direction shown by the 

 arrow, and prevents the cotton from becoming packed. It 



