256 On the Construction of Kitchen 



coln's-Inn Fields, and Mr. Feetham, of Oxford Street, 

 as also Mr. Gregory, Mr. Spotswood, Mr. Hanan, and 

 Mr. Briadwood, in Edinburgh, have engaged in the 

 manufacture of them. Other tradesmen, no doubt, with 

 whose names I am not acquainted, have manufactured 

 them; and as there is no difficulty whatever in their 

 construction, and as all persons are at full liberty to 

 manufacture and sell them, I hope soon to see these 

 roasters become a common article of trade. 



I have done all that was in my power to improve 

 and to bring them forward into notice ; and all my 

 wishes respecting them will be accomplished if they 

 should be found to be useful, and if the public is 

 furnished with them at reasonable prices. 



Several roasters, constructed by different workmen, 

 may be seen, some of them set in brick-work, and others 

 not, at the repository of the Royal Institution. 



I have delayed thus long to publish a description 

 of this contrivance, in order that its usefulness might 

 previously be established by experience ; and also that 

 I might be able, with the description, to give notice to 

 the public where the thing described might be seen. I 

 was likewise desirous of being able at the same time 

 to point out several places where the article might be 

 had. 



These objects having been fully accomplished, I shall 

 now proceed by giving 



An Account of the Roaster, and of the Principles on 

 which it is constructed. 



When I first set about to contrive this machine, med- 

 itating on the nature of the mechanical and chemical 



