75 



to the work in covering weeds, straw and rubbish, and leaves the ground in 

 good condition for subsequent cultivation." 



Another consideration of much impoi'tance is, that the front part of the share 

 and mould-board (always subject to the greatest wear) is made of double thick- 

 ness of steel, giving the plough about twice the durability of those made in the 

 usaal manner. 



When the rules for forming the mould-board, for regulating the draft, for giving 

 the relative position of the mould-board and beam, and the appropriate front 

 angle for adapting the plough to different soils, are carefully obser\-ed, it is con- 

 fidently claimed that these ploughs possess great superiority in their durability, 

 the quality and perfection of the ploughing done, and in the amount of work 

 accomplished in a given period of time. 



Its present perfection has been attained by a series of experiments from year to 

 year; and their uniformity of shape is secured by the use of heavy machinery in 

 bringing the steel and iron into the proper form in the process of construction. 



The same manufacturer is prosecuting further experiments with a view of 

 constructing the plough as good, or even better than at present, with a reduction 

 of at least one-third of the expense now required. 



Experiments, also, during the past season, promise ultimate success in the 

 construction of an improved, cheap corn plough or cultivator, and in adapting a 

 steel subsoil plough to the Western prairies. 



TRANSFORMABLE PLOUGH, No. 1 



The above engraving is a view of this plough in order for breaking prairie 

 with one span of hoi'ses. 



The foundation is made of light boiler iron, the portions coming in contact 

 with the earth being faced with steel plates. All lateral motion being obviated by 

 this method, it combines lightness with great strength. The furrow is turned by 

 means of three rods which, properly adjusted, reduces the friction at least twenty 

 five per cent. 



