SUPPLEMEjVI 



TO THE 



FARMER'S MAGAZINE: 



WEDNESDAY, 21ft DECEMBER, 1803. 



* ^mff^^P i »00i^ 



TO THE COKDUCTOR OF THE FARMER'S MAGAZINIi:. 



On Thrashing Machines. 



Sir, l e t t e r ir. 



TN my last, p. 1 28,! attempted to elucidate the history of thut 

 "^ valuable implement the thrashing machins^ and made a feiv 

 remarks on the improYements suggested thereupon by your 

 correspondent, A. G. (vol. III. p. 428.) which I considered as of 

 small importance eitherto farmers ormechanics. Allow me now 

 to finish these remarks, and to shew, that thrashing ma- 

 chines of a small size, such as are recommended by A. G. are 

 a real and positive loss to the farmer, and that the ftail is pre- 

 ferable to these weak, and comparatively pov/erless imple- 

 ments . 



Your correspondent, speaking of h's water macliines, 

 says, that * where the situation of the ground would admit, 



* I vx^ould propose an inner wheel of eight feet diameter, 



* mounted xvith cast iron segments containing about 200 teeth, 



* and that this siiould turn a pinion attathed to the end of the 

 ' skutch containing about 7 or 8 teeth,' (which by the bye 

 is too small) : and adds, that * the first motion communicated 



* by water, or a horse, will require to be slow,' but does not 

 explain the degree of slowness necessary ; for want o^ whicli 

 I cannot discern any utility in the observation. It is clear, 

 that on the velocity of the first moving power, the whole eiTect 

 of machines, individually considered, must depend, and tliat 

 any errors committed iu the original ccn:;truction, can hardly 



VOL. iv; U u u afterwards 



