AGRICULTURAL MECHANICS AND RURAL ECONOMY. 121 



the addition of the conical nut n and corresponding seat at the lower end of the shaft. This 

 nut is secured to the shaft C, and a key passes through the shaft under it. The shell or 

 concavity in which this nut works is separate from that of B, the cylinder, and it can be taken 

 off and attached to the framing, so as to renew those parts when they get dull, which can be 

 done at a very small cost. The nut n grinds the hominy into meal : it can be enlarged as a 

 corn and cob mill to grind fifteen bushels per hour. 



Wilson's Corn-grinder and Crusher. In a corn-grinder and crusher recently patented by 

 W. D. Wilson, of Richmond, Indiana, the grinding roller of the mill has a V-shaped groove 

 on its periphery, and the concave in which it runs has a similar shaped tongue, so that a 

 great amount of grinding surface is obtained in a small space. 



Crushing and Grinding Mill. A patent for an improved machine for grinding corn and cobs 

 was granted to Jacob Weigle, of Erie county, Pennsylvania, and described with diagrams in 

 the Scientific American, March 31, 1855. The nature of the invention consists in forming a 

 crushing and grinding apparatus by uniting with each other, upon the same shaft, the smaller 



