Construction and Testing of Drills. 43 



themselves with precision into the hoppers, which 

 lead them into the hollow of the ploughshares, which 

 last deposit the seed in the furrow and inclose the 

 seed in an instant." 



Let me attempt a description of the indigo-drill, 

 as seen in most factories. Of late years several pa- 

 tent drills have been invented and tried, but none of 

 them seem to have established a reputation equal to 

 that of the original. The construction of the imple- 

 ment is as follows : On 2 inches to 2j inches diameter 

 wheels, 3 inches thick, invariably made of shisham 

 wood, and roughly tyred with common hoop-iron, is 

 erected a trough, 4 feet by I foot, inside measure- 

 ment, of the same material as the wheels, but gener- 

 ally, now-a-days, lined with 16 inches to 18 inches 

 B. W. gauge galvanised iron ; the average depth of 

 this trough being 6 inches, 2>., from beneath axle 

 (i inch square bar) passing through centre of trough, 

 and up to level of which seed must only be filled. The 

 side walls of the trough are 2 feet long by 2 inches 

 thick, also made of shisham. It is requisite that all 

 the above-named parts be made of shisham (the oak 

 of India). We have next to describe the front-board 

 or platform in which are inserted the nipples for sow- 

 ing the seed, and also, in front of these, the shares, by 

 which the earth is opened to receive the same. This 

 is also 4 feet long, inside measurement, by 9 inches to 



