834 



BOARD OF AGRICULTURE. 



stronger team it is easily worked much deeper and pulverizes 

 the furrow slice satisfactorily. 



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THE DEEP TILLEK. 



The Deep Tiller embraces a series of ploughs now manufac- 

 tured by the Ames Plow Company, designed to embrace a 

 variety of sizes and forms of the mouldboard adapted to every 

 kind of soil and peculiarity of a varied agriculture. The mould- 

 board is formed by a series of straight lines in the direction of 

 the movement of the furrow slice, but admits of all the varia- 

 tions required to produce a longer or shorter mouldboard, of a 

 gentler or more abrupt curvature, with straight or more or less 

 concave lines laterally as difference in soils or practices may 

 require. The mouldboards have a combination of curved lines 

 and planes having an equal bearing upon the furrow slice, and 

 receiving an even polish upon their whole face, giving the fur- 

 row slice a complete and uniform twist in turning and leaving it 

 in the desired position and in a mellow condition for the harrow. 

 Both these ploughs did admirable work. 



The " Conical Plough," invented and made by Solomon Mead, 

 a practical ploughman, of New Haven, Connecticut, is another 

 instance of the adaptation of the various parts of the plough 

 to mathematical principles. 



The mouldboard is made to fit the frustrum of a cone with 

 the base or larger end forward. A block of wood, rounded off 

 in the form of a cone, will fit closely to the surface of the 

 mouldboard from the highest point to within about two inches 

 of the cutting edge of the wing of the share. The angle of tho 

 share, for two or three inches of the cutting edges, is" so slight 

 that some inches of the furrow slice are completely separated 

 before it rises much. This gives an easy separation of tho 

 furrow slice, since it rises slowly and gradually at first till it 



