DESCRIPTION OF AN HYDRAULIC BELLOW^. 219 



th& air, may be applied to the cafe mentioned by Cadet-de- 

 Vaux, and anfwer the purpofe with infinitely more fpeed and 

 perfection. It appears, therefore, that thofe methods only 

 ought to be ufed in fuch cafes. For the fumigations operate 

 of themfelves, and without the a (ft fiance of a workman ; 

 whereas the painter of an apartment or infected chambef 

 muft neceflarily expofe his health, and fometimes even his 

 life. 



It only remains, after having thus endeavoured to fimplify the Suggeftlon that 

 procefs which Cadet-de-Vaux firft brought to' perfection,, that J n Sk prhuinj 

 I mould exprefs my with that the advantages it really poffeffes of paper hang- 

 might engage the manufacturers of paper hangings to adopt its inss * 

 ufe. The inhabitants of the country, who muft naturally 

 be more ftrongly imprefled with its advantages than thofe of 

 towns, will, no doubt, be the firft to avail themfelves of it. 

 This application may at leaft affift us in faving an annual 

 tribute, which our manufacturers pay to foreigners for animal 

 glue or fize. If cheei'e could hereafter be ufed as a fubftitute 

 in block printing, I mould think myfelf happy to have con- 

 tributed one ftep towards the perfection of an art no lefs ufeful 

 than agreeable. 



XII. 



Defcription of an Hydraulic fiellozis for a Smith's Forage. By 

 Mr. J. C. Hornblower. 



To Mr. NICHOLSON. 

 S I R, 



I SEND you a (ketch of a fmith's bellows a little out of the Small hydraulic 



common way. Its application to my purpofe was fuggefled ^ ,ovvs ior a 



by an acquaintance I had by the large machines of that fort 



ereded at Willy Furnace, by the late Mr. Ifaac Wilkinfon, 



father to the prefent Mr. John Wilkinfon, about forty years 



fince, and where circumftances or inclination have taken the 



lead, I have adopted the principle occafionally in this form. 



What I have principally in view is, to mention to you a Its effeft com- 



very {hiking difference between the effea of this bellows, and P 31 ^™^ c ° m ' 



111.,.,, • mon leathered 



a common leathered 30 inch bellows in the fame fhop. The bellows. 



leathered bellows throws conliderably more air to the fire, and 



4 its 



