gg GAS LIGHT FROM COAL. 



desirous to have a plan of his method, which my nephew 

 promised him, and 1 undertook to get it conveyed to you. 

 1 have, accordingly, taken the opportunity of sending to 

 the Society of Arts a plan and explanation of his appara- 

 tus. 

 used gif lights He lighted a large manufactory in Yorkshire some years 

 somt-year- ago, Q U p OU ^ us principle, and has since lighted some build- 



and freed them » r , . x , 



from offensive ings in this neighbourhood, and 1 believe he is the first 

 smell. person, who succeeded in rendering these lights free from 



the offensive smell which generally accompanies them. 

 My nephew served an apprenticeship to Messra. Boulton 

 and Watt, of Birmingham, in the steam engine business, 

 in which he is now engaged here on his own account, and 

 has made considerable improvements in their construction 

 I remain, dear Sir, 



Your most obedient servant, 



ASHWORTH CLEGG, 

 Manchester, May 18, 1808, 



SIR, 



Cost of the ap- Your esteemed favour I haye received, and, according to 

 paratus. your request, have sent you a fuller explanation of the gas- 



ometer and lamp, accompanied with farther drawings. 



A gasometer, containing seven hundred cubical feet of 

 gas, weighs about twenty hundred weight, and costs about 

 two pounds ten shillings the hundred weight. 



The whole of an apparatus complete, capable of support- 

 ing forty lamps for four hours, each lamp affording light 

 equal to ten candles of eight in the pound, will cost about 

 two hundred and fifty pounds. Each lamp consumes six 

 cubical feet of gas per hour. I am happy to rind, that the 

 Society have honpured my communications with their atten- 

 tion, and I remain, with great respect, 



, SIR, 



Your most obedient servant, 



S. CLEGQ, 



Manchester, Aug. 12, 1808 f 



Reference 



