GENERAL REMARKS ON THE USE OF AGRICULTURAL MACHINERY. 483 



is connected to the top of the T axle, on which the front wheels 

 work. It will be seen by this arrangement that, if the handle is 

 turned to the right, the machine is lifted up ; and if to the left, 

 let down : this is indicated by the dial-plate on the right-hand 

 side of the machine, marked in inches, in and out of the ground ; 

 one rotation of the handle raises or lowers the machine one 

 inch.&quot; 



This instrument, wherever it has been used, has been highly 

 approved. 



It will be obvious to my readers, that the object of these sev 

 eral inventions is to put the ground into a fine and deep cultiva 

 tion ; and, in many cases, the scarifier will be substituted with 

 great advantage for the plough. In the spring of the year, es 

 pecially, where land has been ploughed in the autumn, it would 

 be most injudicious, in many cases, to reverse the sward with a 

 plough, and at the same time, as the wetness of the land may 

 require that it should be cultivated lightly, a harrow or scarifier 

 presents the most proper implement. 



As a matter of curiosity, a Table of ingenious, exact, and 

 somewhat useful calculations, in regard to the business of 

 ploughing or scarifying land, will be inserted on the last page 

 of this Report. 



LXXXVII. GENERAL REMARKS ON THE USE OF AGRI 

 CULTURAL MACHINERY. 



In presenting these different examples to my readers, they will 

 not expect me to recommend them, nor to mark a preference of 

 one over the other. That I must leave wholly to their judg 

 ment. I have only to say that the best results are to be ex 

 pected only from the most careful and thorough cultivation; but 

 with the best feelings towards those ingenious mechanics and 

 artisans who have done so much to alleviate and facilitate labor, 

 my own experience, and that of many friends, would lead me 

 to advise to caution in the purchase of any machines whose 



