FIG. 13. THE SIBPUR PLOUGH. 



167. These improved ploughs not being provided with a 

 double stilt, the steering of the bullocks can be done by the 

 same man who holds down the plough. The Meston plough 

 is so nicely balanced that it needs little effort on the part 

 of the ploughman to hold it down, but, as already said, it is 

 unsuitable for heavy soils. 



168. Principles of improvement. As there is no doubt 

 we have not come to the limit o; improvement in the manufac- 

 ture of ploughs on rational principles for Indian raiyats, 

 it is necessary to have a clear idea of the principles on 

 which the construction of European or American ploughs 

 is based, and of the character of the chief forms of these 

 ploughs and the method of using them. 



(i) The furrow-slices lifted by these ploughs are com- 

 monly rectangular in section (Fig. 14), but they are some- 



FIG, 14. -RECTANGULAR FURROW-SLICE, 



