AGRICULTURAL MECHANICS AND RURAL ECONOMY. 



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forming together an effective crusher for the corn and cob when ground together. In the 

 space between the base of the breaker c, and the inner edge of the conductor e, are secured 

 by bolts (in such a manner as to be readily removed when required) a flat ring of steel or 

 hardened iron m, with grinding teeth on its upper side, of any convenient form ; but it is 

 preferable for crushing or coarse grinding to use teeth the transverse section of which pre- 

 sents one side inclined and the other vertical. The mill is run in such a direction that the 

 vertical sides of the upper and lower grinding surfaces shall meet each other. In a groove m 

 the upper plate /* is placed another ring o of the same size, material, and form as m, with the 

 teeth of the same form, and arranged as before described : this is also removed when required. 

 Between the ring o and the central opening is a circle of large teeth inclined to the rear, and verti- 

 cal to the front, and bevelled upwards on their inner edges for the purpose of forcing or crowding 

 the grain on to the rings. It is preferable in grinding fine meal to run the grinding surfaces 

 in such a direction as to oppose the inclined sides of the teeth in one ring to the inclined sides 

 of the teeth of the other ; and with that view another pair of rings are made to fit in the same 

 places as the others, with the inclined sides of the teeth reversed. Upon the top of the pivot 

 d is a cap p which rests on the sleeve g. Through the cap, pivot, and bed-plate a screw q 

 passes, having its nut at the bottom; the object of this screw is to regulate the mill by press- 

 ing the grinding surfaces together. Upon a flange on the edge of the central opening is a 

 suitable hopper. Upon each side of the hopper, resting upon the top plate h, and secured 

 thereto by bolts, is placed a piece of scantling extending to about twelve feet from the centre 

 of the mill ; they there meet at a very acute angle, forming a lever secured to a bolt, by which 

 the horses are attached. A board s extends from one of the ends of the scantling to the other, 

 upon which a man can stand to feed the mill. 



This mill is best adapted for crushing and grinding corn and cob together, or by using the 

 rings which present the inclined sides of their teeth to one another for fine meal, etc. If the 

 teeth should wear out or break, fresh rings can be put in at a trifling expense. The annular 

 conductor is a good improvement upon mills of this description, which allow the meal to fall 

 from all parts of the base of the concave. 



Granger's "Magic" Corn and Cob Mill. 



This invention, patented September, 1855, and which received the first premium for grind- 



