l8o4.^|5if -D^J'^^'z/'^^o;/ of the Stafford Wheel-Plough, ^jM^' 



good mortar with three bolls of land. TIius each boll c>f thefe 

 burnt lime Hones was converted xiito no lels than nine bells of 

 building mortar, whereas each boil of the iLdinburgh limt-fhells^ 

 Hacked to two bolls of powder, and each of tb'* bolis of powder 

 requu-ed only two bolls of fand to make [)ro])er mortar. -Thu> 

 the boll of lidinburgh burnt lime (lone was co.ivertible into no 

 more than four times its quantity of mortar. 



From what has been faid, v ill appear the vail difference in the 

 qualities of limes that are even generally erteemed good ; and 

 from the lait mentioned comparative trial, it will be apparent to 

 every one, that it may fometimes be proper economy, where 

 there are two places for obtaining limes, fuppofed in general to be 

 of equal quality, though the one may be iituated at double dillance, 

 or fold at double the price of the other, to fetch it from the 

 place at the greateft diitance, and of the higheft price. 



I am yours, &c. 



A. S. 



FOR THE farmer's MAGAZINE. 



Litter from Mr William Pitt, co?icerni?ig the Staffordshire 

 Plough, with a Figure thereof cominunicated by Sir John 

 Sinclair, Bart. 



Sir, Pendcford, July lo. 1803. 



In my accoimt of Staffordshire ploughs, referred to in 

 your letter, I believe I have used an inaccurate expression in 

 the term * sutgle wheel plough ;' it should have been, sifigle 

 furrow wheel plough ; and was meant to distinguish it from 

 the double furrow, or tw o furrow wheel ploughs ; for both 

 are in common use in this country, and both are guided by- 

 two wheels, the one going in the furrow^ the other on the 

 unploughed land, much in the manner expressed in the draw- 

 ing. Until about 30 years ago, the ploughs in this neighbour- 

 hood were universally swnig ploughs, with a hoLler ?.)\d 

 driver, upon a good construction, and made good woik. 

 When the wheels were applied, no alteration took place m 

 the construction of the plough, except pitching it a little 

 deeper, (i. e.) more inclined to the soil, the excess of which 

 is counteracted by the wheels. The swinir plough, without 

 wheels j is still used for short land, hedge sides, and ill foimed 

 corners, where a holder and driver are both necessary, on ac- 

 count of the frequent turnings, as the wheel plour^h i? more 

 liable to catch roots near hedges, or other powerful obstruc- 

 tions, whereby the shares mi«ht be bent, or the tool itself 



broker. 



