History of the Plow. 



Ill 



BloomfieUl, Michigan, who obtained a patent May 10th, 1844. 

 This is the plow which first came into notice as the " Michigan 

 plow " at the great trial by the New York State Agricultural 

 Society, at Albany, in 1850, and which, with some important 

 modifications, is now known as the sod and sab-soil plow, and is 

 one of the best plows in existence for sod lands. A figure of this 

 plow complete is given in the Society's Transactions for 1850. 

 Figs. 69 a, 69 b, 69 c, 69 cZ, 69 e, 69 /, 68 and 69 represent the 

 plow in detail. Fig. Q>^ represents the sole; Fig. 69 _/' represents 

 the sole of the share. 



The following extracts from the specification will give an idea 

 of the principles involved in its construction: 



" Fig. 68 is a plan of the hind plow as I draw it on my working- 

 board when preparing to make a pattern. The numbers on the line 

 J J, representing the land side, show the distance between the 

 principal points of the varying outline of the mould-board as 



T\^ 



Fig. 68. 



marked by the dotted lines drawn at right angles to the land-side 

 and terminating in those principal points. The distance from the 

 face of the land side to these principal points are marked on these 

 dotted lines. 



" Fig. 69 is a rig-ht-hand or face-view of the mould-board, with 

 the share attached, showing the outline of its respective sides. The 

 line u I is erected perpendicularly from the point of the mould- 

 board. The measurements in the dotted lines, drawn horizontally 

 from the perpendicular, give the outline of the head of the board. 



