DIGGING PLOUGHS. 



711 



it with a sharp crest : the new plough inverts the furrow, but by the 

 somewhat dished form of the mould-board, throws the mould out loosely, 

 much as is done by the spade, leaving it light. It is safe to predict that 



O 



CO 

 CSI 



oil 

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in course of time this plough will supersede the older kinds on all but 

 the heaviest land, and already, though there has been a great prejudice 

 against it, it is gaining favour on the heavy soils. 



The plough illustrated in fig. 261 shows a strong frame with a share 



