62 AGRICULTURAL ENGINES. 



thing complete on its own wheels (the drum, &c., excepted), 

 which you may convey with one horse from farm to farm as 

 easy as a common cart. 



" If you have not sufficient work for it you can lend it to your 

 neighbours. The last engine I erected was about three weeks 

 since, for a farmer that kept four horses and two drivers. The 

 parts of the horse machine thrown out of use, together witli the 

 four horses, sold for more money than he gave me for the engine, 

 exclusive of 41. per week that it cost him in horse keep and 

 drivers to thrash 3000 sheaves per week. 



" Now the engine performs more than double that work, and 

 does not cost above 10s. per week ; and the labourer in the barn 

 does double the work he did before for the same money. If 

 you wish the same engine to have sufficient power to turn one 

 pair of mill-stones, the cost will be 220 guineas. 



" E. TREVITHICK. 



" MR. J. RAWLINGS, Strood, Kent" 



" CAMBOKNE, 28th August, 1813. 



" MESSRS. HAZELDINE, KASTRICK, AND Co., 



"Gentlemen, Lord Dedunstanville's engine thrashed 

 yesterday 1500 sheaves in 90 minutes with 40 Ibs. of coal. 



" KD. TREVITHICK." 



The first steam thrashing engine was worked by a 

 labouring man for eighteen months, without needing 

 repair, or even attention beyond three or four minutes 

 each hour to put on a little coal. 



Necessary stoppages for various purposes caused a 

 day's work to be no more than the engine could per- 

 form in half a day. No additional feed-water was re- 

 quired during an ordinary day's work to thrash 1500 

 sheaves of wheat with 168 Ibs. of coal, while on a spe- 

 cial occasion that quantity was thrashed in an hour and 

 a half, consuming only 40 Ibs. of coal. Three horses 

 during three days were required to do the same amount 

 of work. A farmer sold his horses used in thrashing 



