[ '43 ] 



the other side. At the end of the field the position is revers- 

 ed, the set which was kept raised being now brought into 

 action, and the plough is turned in the ordinary way as 

 a carriage is turned. In the Turn-wrest plough there 

 is only one set of share and mould-board v which are 

 reversible round a hinge while in the Balance plough 

 there are two sets. In ploughing hill-sides the ordinary 

 system of ploughing round and round a field is unsafe, 

 as the bullocks are liable to go down the precipice or get 

 choked with the ropes with which they are attached to the 

 yoke. It is safer in hill-side ploughing to take line after line 

 in the lateral direction only. If cross-ploughing is done at 

 all, the bullocks should not be made to plough up-hill but 

 simply walked up and the down-hill ploughing if no terraces 

 have been made should be done with the greatest care. 

 Turn-wrest ploughs can be easily introduced into 

 India, as the cost would not be prohibitive and it is easily 

 driven by a pair of bullocks. 



183. The Sulky plough is used in American prairies. 

 The ploughman sits and drives and covers 5 acres a day. 

 2 furrows 3" or 4" deep are turned over at the same time. 

 It is driven on light but strong wheels almost as fast as a 

 carriage is driven. For perfectly level prairie land it is a 

 very useful kind of plough. 



184. 'I\\t potato digging plough is fashioned like an ordi- 

 nary plough 5 but it has two shares, one behind the other, both 

 elevated posteriorly and divided or forked. The shares 

 are driven in underneath the ridges to turn out potatoes. 

 The Potato-digger by Story and Son of Jedburgh, Howard 

 and other makers, is not exactly a plough. It consists of a 

 strong frame-work run on 4 wheels, the 2 front ones being 

 smaller than the hind ones. A broad sharp share passes under- 

 neath and lifts the potato ridges whtie a set of 8 revolving 

 forks working at right-angles to trre ridges above the share 

 is worked by the hind wheels. This is put on or off gearing 



