Defcriptlon of" a Drain PlougB', s6i^ 



the fmelUng-hoLifes at the copper-mines to be reduced along- 

 with the ores, and refined by the common method. 



C. Napiont', having calculated the expenfe ncccflary for 

 his procefs when executed on a large fcale, conclvsdes that,. 

 in ihe prefcnt circumflances, it will never amount to a fifth 

 part of that which refining by common liquation requires. 



XLV. Defcrij)tion of the Tiule of Bridgewater's Drain 

 Plough * . 



I SIR, 

 AM fiu-oured with vnurs of the 15th inftant. The model 

 of the guttering-plough font you, was a prefcnt to the Society 

 from his Grace the Duke of Bridgcwater, made bv Robert 

 Tomlinfon, one of his Grace's conltant workmen. 



I procured the following account this morning from the 

 duke's farmer: — In clay or ft iff land that lies flat, The plough 

 cannot go too deep ; but if it lies on a declivity, about five 

 inches deep is fufficicnt. In foft light foil, the plough fliould 

 go as deep as it can in all fituations, bccaufe the fides moulder 

 into the gutters. The bcft time of draining is about Mi- 

 chaelmas, or as foon as the grafs is eaten ; and the whole 

 fhould be accompliflicd betwixt that time and Chrillmas. 



In clay ground that has never been drained, fix good horfex. 

 will be rt-quifite to draw the plough. In every following 

 year the plough fliould be run through the fanie gutters, and 

 four horfes will then be fufficient. I am, Sir, 



Your mofl; obedient fervant, 



Thomas Bury. 



P. S. The fiiare of the plough muft be well (lecled, and 

 Hiould be ground (harp. 



Uorlliy, 

 Sc;>r'iTibt.T ■ K, I Soo. 



Mr. Charles Taylor. 



*»* At Broughton, in the neighbourhood of Mancheflcr, 

 confiderable quantities of ftiffclay, pafturc, and meadow land, 

 have been much improved, under the infpeftion of the Se- 

 cretary of the Society, by the ufe of this plough. 



After the cattle were houfed for the winter, three horfes 



* Fri)m tlic "franfafiijiu of ibr St.ieiy for the Emourngeniml of Arts, 

 (sfc. i^oi.— The thanks of the Society were this feliiun voted to his 

 (»race the Dyke of l-tritij^ewatcr for a model of tliis drain plough, pre- 

 fcntcd by him to them, and fcnt with the above commnnicrition frohi his 

 GtHCt's agent, Mr. Thom'is Bury, of Worflty Mills, near Manchcftcr. 

 Tiie model, which is made upon a f'calc of one inch to a foot, is placed 

 in the Society's rc^jofitory for public infjiedUon. 



were 



