History of the Plow. 



41 



two and one-quarter inches. The breadth ot the sole flange is 

 two inches, the greatest thickness in any of the parts is three- 

 quarters of an inch, and the total weight of the frame is thirty 

 pounds. 



Tlie Share. — Figs. 32 to 37 are illustrations of the share and 

 its configuration; Fig. 32 is a plan; Fig. 33 a geometrical eleva- 



J3. 



J^iff. 37- 



tion of the furrow side, and Fig. 34 is a direct end view looking 

 forward, of which a is the boss adapted to the curvatnre of the 

 mould-board; b, the land side flange, which embraces the head 

 of the land side; c, the sole flange, embracing in like manner the 

 head below; and these three parts form the neck or socket of the 

 share, fitting closely upon the head, and being in effect part of 

 the mould-board. The part d ef, Fig. 32, forms the share proper, 

 consisting of dee, the shield terminating in the point e, and of 

 the feather or cutter running oflf at the point e. The extreme 

 breadth of the share in this plow, measuring from the land side to 

 the point g of the feather (or the rear angle of the feather'), varies 

 from six to six and one-half inches; and its length in the sole, 

 including the neck, 6, is about sixteen inches, the feather, g e, 

 being eleven inches. 



The other figures, 36 and 37, are transverse sections of the 

 share on the lines p-p- and hh, respectively, exhibiting the struc- 

 ture and relation of the shield, and the feather represented by 

 the line A' V, Fig. 49, Plate II, where, as will be observed, the 

 cutting edge, through its entire length, lies within less than one- 

 quarter of an inch of the base line. 



The share is of wrouoht iron, and is always formed from a 



