222 



SMALL-SIZED MACHINE. 



In conveying to the reader an idea of this and the following 

 machine, it appears unnecessary to repeat the diagram, with 

 reduced dimensions, as he will be able, without the assistance 

 of the capital letters, readily to apply the sizes about to be 

 given to the parts just now minutely described, so that he may 

 construct all, or any one of the three machines, according to 

 his fancy. The description and uses of the different parts of 

 the two lesser machines, however, shall be repeated nearly in 

 the same terms as above, in order to prevent any intricacy of 

 reference from one to another. 



The specification and dimensions of the small-sized 

 machine are the following. The pole is only 12 feet long 

 (including the iron ring at the point,) 3i inches broad, and 4 

 In. thick, tapering to 2| at top. The ring is for the purpose of 

 receiving the pole-rope, and is 3 In. in diameter. At the top 

 of the pole there is a small bend, 3 In. off the straight, in 

 order to prevent the bark from being chafed, or stripped off 

 by the ring. Under the point of the pole there is a block of 

 iron, with rounded edges, 3 In. long, by 1 In. thick, and well 

 steeled; so that, whenever the point of the pole happens to 

 be trailed along the ground, it may withstand the friction, 

 without injuring the surface. There is likewise, on one side 

 of the pole, a plate of iron, extending from within 18 In. of 

 the axle nearly to the top, for strengthening the pole. It is 

 1^ In. broad, i In. thick, and sunk into the wood. This 

 plate, in order to render it more powerful, should be in one 

 piece. 



The iron axle is 4i F. long between the washers (exclu- 

 sively of a head at each end, Hi In. long, which is fitted to 

 the bushes of the wheels,) and2i In. square, with a curve in 

 the centre of 2 In., for the sake of greater strength. The 

 dust-hoops are 1 In. broad. The wooden case, or axle-bed, 



