INVENTOR -.OF THE MODERN PLOW. 33 



protect it effectually, on the upper and lower 

 sides, but not on the land side. 



"After the cutting edge is thus adapted and 

 adjusted to the mould-board by means of the 

 indentations, pins, holes, ship-laps, and fasten- 

 ings, it is fixed to its place and prevented from 

 slipping back, or working off, by wedges or 

 pins of wood, or other material, driven into 

 the holes from the inner and under side, and 

 forced tight home by a hammer. 



" In the fourth place, the said Jethro Wood 

 claims the exclusive right of securing the han- 

 dles of his plough to the mould-board and 

 land-side of the plough by means of notches, 

 ears, loops, or holders, cast with the mould- 

 board and land-side respectively, and serving 

 to receive and contain the handles, without the 

 use of nuts and screws. For this purpose one 

 or more ears or loops, or one or more pairs of 

 notches or holders are cast on the inner side 

 of the mould-board and land side, toward their 



