No. 112, 1 129 



Pitts' machine is furnished with an open cylinder : this is 

 deemed objectionable as some of the heads of wheat or other 

 grain are lost by falling through the open spaces. This loss was 

 particularly noticed when the Pitts machine was working with 

 the endless chain power, at which time it was divested of the 

 cleaning apparatus. When," however, the cleaning apparatus was 

 attached, it made clean work, as the falling heads were carried 

 back by elevators and thrashed over until they were clean. A 

 marked difference in value exists, therefore, adverse to the use 

 of open cylinder?, unless accompanied by apparatus for re-con- 

 veying the loose-falling heads to the cylinder. 



Westinghouse's cylinder moves upon steel journals ; moveable 

 tin curtains are supplied to keep dust and stones from the face of 

 the operator; in other respects there is little, if any difference, 

 from other machines. 



The plan and construction of Eddy & Go's machine recom- 

 mend it for durability and ease of repair. The cylinder is formed 

 by a series of iron rings on an iron shaft passing through their 

 center; two wrought iron arms pass from near the center of 

 each ring through the circumference, and by their projection be- 

 yond it, form the teeth of the cylinder, which is hollow, not liable 

 to burst or fly apart, and in case of fracture may be repaired with 

 great facility. 



It will be noticed in the table that with the exception of Sco- 

 vilPs, Eddy's cylinder is the heaviest, and therefore at equal 

 speed would have the greatest momentum, and if the resistance 

 was uniform, would absorb the most power ; but in tlirashing, 

 when motion is obtained from horse power, the resistance is ir- 

 regular, and we apprehend the weight of the cylinder will not, 

 in fact, require more power, but in effect operate like a fly-wheel, 

 equalizing motion. 



The simplicity of construction of this machine, and its general 

 excellence, obtained commendation from every member of the 

 committee. 



[A«. Tr. '5;il I 



