44 Construction and Testing of Drills. 



10 inches broad, by 3 inches thick, again of shisham 

 wood, and to it the trough is attached. This platform 

 is bored at distances of 6 inches apart in a double 

 line to receive the tubes and shares, the former of 

 which, beginning flush with the platform, extend 9 

 inches down inside the shares, which are generally 

 16 inches in length, including a 2-inch point or tip. 

 A simple board, I inch thick, is fixed in on end 

 between the nipples and shares to prevent the seed 

 from being thrown outside. Thus, in a drill of 4 

 feet length, inside, there are eight tubes and eight 

 shares. The tubes are made of B. W. gauge galva- 

 nised iron ; are round and gradually tapering towards 

 the bottom, being generally ^ inches round at top. 

 The shares are merely flat bar iron, I inch by 

 y^ inch, upon which, at bottom, pieces of l /i inch sheet- 

 iron, gently graduating outwards, both to receive the 

 tube end and also to make a furrow, are welded on. 

 These share sides are usually 4^ inches to 5 inches 

 broad, and 2 inches wide at outer rim. Inside the 

 trough, and upon the axle, with which they revolve, 

 are placed, at equal distances with tubes and shares, 

 small round wheels, 7 inches in diameter, which 

 are slightly perforated round the disc with small 

 round holes, which, with every revolution, raise the 

 seed in the trough and eject it into the tubes in 

 the front board or platform. The average number 



