122 
American Implements, and 
bold curve which is usually given to this mouldboard is not 
adapted to lay tlie even unbroken lap so much admired in 
England, but leaves the land in a more broken and pulverized 
state. It would probably be but ill-suited to our stiff clays. The 
great manufacturers, however, make them of all shapes and 
dimensions to suit all soils and every taste. The coulter is some- 
times separate, sometimes inserted into a prolongation of the 
share. This is called the lock coulter, and is useful in newly- 
broken land to prevent the plough from being " choked" with 
rubbish ; sometimes it is a sliarp steel disk, sometimes a per- 
pendicular projection from the share (" the fin share.") 
Swing ploughs are the rule, and it is rare to see more wheels 
than one small one beneath the end of the beam. The share, 
mouldboard, and land side are usually made of chilled cast-iron ; 
but in the Prairie States the mouldboard is of chilled steel, as 
iron will not scour in the rich vegetable mould of the Prairies. 
Tlie wooden beam is generally reinforced by an iron draught rod. 
The price of these ploughs by the best makers varies, according 
to size, from 3 dollars to 21 dollars, which is the price of the 
largest steel ploughs ; but a very good plough, complete, may 
generally be purchased for 10 dollars (2/.), or about one-half the 
price of the same class of English ploughs. Their compactness 
Fig. 2. 
American Tum-wrcst Plough. 
Pivot at A and B, around which the mouldboard, F, with sliare, G K, turns under- 
noath II, on unhooking the rod, E, which holds the mouldboard in its place 
when the plough is at work. L is the connecting-rod, by which at A and C and 
end of D the mouldboard is attached to the hinge, A B, around which it turns. 
The rod, .1, holds this swivel-rod, L, in its place. Length from A to B, 13 inches; 
A to K, 23 inches. 
