Qg MACHINB FOR CLEARING ROADSt 



Machine for Efq, Frederick Cowflad, Efq. Rev. Thomas Beft, Mr. Richard 

 Smmud?'^' Baily, Mr. Thomas Clark, Mr. John Baily, Mr. Jofepfc 

 Tanner, Mr. Thomas Pocock. 



" Refolved, that the machine invented by Dr. Winter- 

 bottom, for fcrapjng off mud from turnpike roads, will be of 

 public utility, and fave confiderable expence of labour." 



After this public teflimony in its favour, I might perhaps 

 be excufed from producing the certificates of a few indi- 

 viduals : it will> notwithftanding, be neceflary to give fome 

 eftimate of the probable faving to be expe6led from its ufe. 



In all trials made previous to the 21(1 of February, the 

 inachine had been worked upon no meafured extent of ground; 

 but the general effects were fuch, that feveral perfons of great 

 experience in the management of roads, rated the daily work 

 of one machine only as equal to the labour of fifty or feventy 

 men : fifty being the lowed eftimate ever named. 



A few days ago I diredted fome work to be doneby meafure; 

 and I can now fiate it as the opinion of- two very competent 

 judges, that one machine will clear three miles in a day^ 

 twenty feet wide (confifiing of four lengths, and making the 

 day's work twelve miles) which is confiderably more than 

 120 men can do in a day. 



I. s. d. 

 120 men, at 25. per day 12 



Four horfes and two men can here 

 be hired to work the ma- 

 chine for the day, at - 1 5 



Difference - . * 10 15 



At a diftance, where carriages run principally in the centre 

 of the road, the chief bufinefs in the management of it con- 

 fills in keeping the fides clear and open. One machine may 

 therefore be occafionaliy employed in oulfide work only; that 

 is, may go fix miles, and return, (making twelve miles, as 

 juft mentioned) with the faving already given. 



Whatever furprife thefe calculations may occafion, the 

 Society will periiaps be fatisfied that I have not over-rated 

 them, when I produce the refult of a fair experiment, made 

 on the 2.5th of February, in the prefence of four truflees 

 (Frederick Page, Efq. Francis Page, Efq. Mr. Thomas 



Clark, 



