On the Cure af Affecl'ions from the Vo'ijon of Lead. 119 



contaA v,ilh the iron, The quantity of metal is reduced by 

 the former, and the quality injured by the latter. Though 

 Jong cuilom, by a continued ufe of fuch fhaped pipes, has 

 prevented their pernicious effefts from being obferved, yet 

 they muft prove in many cafes detrimental to the oeconou^i-P 

 cal diftribution of air, and the manufiifture of iron. 



Fig. 2. reprefents a nofe-pipe, of another conftruction, even 

 more exceptionable ; becaufe the air difperfmgllill more fud- 

 denlv, in a degree fomewhat proportionate to the more fud^ 

 den contradion of the pipe, a conliderable quantity never 

 enters the furnace, but, ftriking on the exterior wall, i§ thence 

 fepelled. 



A difcharging-pipe conftrufted as in Fig. 3. would obviate, 

 in a great meafure, the imperfeftions of the t\vo former : the 

 length of the tapered piece is la inches, of the llraight pipe, 

 6 inches ; extreme diameter as in the others, 5 inches ; dia- 

 meter of (Iraight pipe, 3 inches. From fach a pipe it is con- 

 ceived that the blaft will proceed to the grcateft pothble dif- 

 tance unimpaired in compreffion and velocity. So far, there- 

 fore, as the abfolute force of the blaft and breadth of the fur- 

 nace will permit, dccompofition will be prevented on the level 

 pf the pipe, and the manuf.iclurer freed from the evils which 

 J have at)ove detailed, as attendant upon dccompofition in 

 that quarter. 



|V. Communication from Mr. Henry Cluttereuck, 

 Surgeon to the Univafal Royal Difpenfary, on the Cure 

 of thofe AJfeSiotis luhkh arije from the Pofou of Lead. 



To the Editor of the Fhilofophical Magazine. 



X HE extenfive circulation of your jSIagaxine amongft the 



mnnufa^luring claflos of the community, appears to me to 



render it a proper vehicle for the following comntimicalion. 



iihould you be of this opinion, your inrertion of it will oblige, 



Sir, your humble Servant, 



11. CLUTTEREUCK. 



Wil'orouk, March 7, iRoo. 



IN 



