AGRICl'I/ITKAL KN< JINKS. 7 



machinery, that either power might be used. Its first 

 cost untl expense in working to be much less than that 

 of the Watt low-pressure steam vacuum engine. 



[Hough draft] 



" SlR CHARLES HAWKINS, Bart., " CAMBORXE, June 13th, 1812. 



"Sir, Yours of the 15th of last month I received, 

 enclosing a drawing of a sugar-mill from Mr. Trecothick, which 

 I should have answered per return, but was at that time in 

 treaty for an engine for a sugar-mill with a Mr. Pick wood, who 

 is in St. Kitts in the West Indies. 



" The engine is now being erected at Hayle Foundry, of the 

 power of twelve mules at a time, or equal to forty-eight mules 

 during twenty-four hours. 



"The cost is 210 complete, with numerous duplicate parts. 



" I hope she will be finished and sent off in a short time. 



" I have now so fully proved the use of those engines, that I 

 have engaged to take this one back if it does not answer their 

 purpose, and to refund the whole sum if they return the engine 

 to me in working order within four years. 



" This gentleman says, if this engine answers he shall have 

 two more for his own use, and four of his friends are waiting to 

 see the result before ordering their engines. 



'' The mules that will be turned out of use by Mr. Pickwood's 

 engine will sell for five times the sum the engine will cost him, 

 exclusive of the wear of mules, with their keep and drivers, 

 besides the greater dispatch and pleasantness of working a 

 machine instead of forcing animals in so hot a climate. 



"If your friend wishes an engine of this power and on the 

 same terms, I can get two made and sent to London nearly in 

 the same time as one. Enclosed I send to you a rough sketch 

 of the engine and mill. I am of your opinion, that Sir John 

 Sinclair has taken a useless journey by calling on the Navy 

 Board, for nothing experimental will ever be tried or carried 

 into effect except by individuals. 



" If I could get an Act of Parliament for twenty-one years 

 for only one-tenth part of the saving which I could gain over 

 animal power and expense, I have no doubt but that I could get 



