100 



THE YEAR-BOOK OF AGRICULTURE. 



wlfy. 2 is a section of a side elevation. The same letters in the description refer to the 

 same parts. 



The cams are arranged on the axle, the markers on the periphery of the carrying-wheel, 

 and the valves at or near the bottoms of the seeding-tubcs with their several operative parts 

 for t lie purpose of causing regularity in the marking and dropping of the seed, how 

 irregularly the motion or speed of the machine may be. 



A is the carrying-wheel upon which the machine is supported and drawn over the ground 

 to be pleated j B ia the axle, fastened to the wheel, to u to move with it. The axle extends 

 out each side of the wheel a suitable distance, ami is provided with cells at regular intetf 

 which receive from the hopper and carry to the seeding-tubee the grains to be planted. 

 These cells are provided with screws, the heads of whiofa fit the cells BO that by running in 



or out of these the depth of the cell will be Lnereased or diminished, so as to carry around 

 only the regulated quantity of grains to be planted. In planting check-row-, each alten 



screw i- raised to the periphery of the axle, so as to pa-- through the hopper without receiv- 

 ing any grains therefrom When drilling, all the eerewa an sunk, so tha* eO shall 

 carry out its quota : and in this case the valves in the tabes ara hooked in tin fSOOnd Of 

 lower hole, so as to remain all the time open. representa one of the thefts; they are 

 cun ther at their pointi to suit the working of she horse, while at the 

 axli-, where the teeth or those arc arranged, their width may oonfom to the distance bet* 

 the rowi of oorn. I' i- the teed-box, there being one on each tide of the wheel or on each 

 end of the axle — said hoppers diminishing in width from top to bottom, where they arc open 

 to allow the grains to drop into the cell-. I', i- a tooth or shovel — there being one in ad\ i 

 of m ling-tube — for opening up a furrow Into which the corn is dropped, the earth 

 falling in over it when the machine passes, as in ordinary operations. The bottoms or lower 



