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Mr. Jeffreys' method 



Art. IV. A Description of a Method invented by Mr. 

 Jeffreys, of Bristol, for condensing Smoke, Metallic 

 Vapours, and other Sublimed Matters, by which they are 

 prevented from passing of into the Atmosphere. 



It is hoped the following explanation, aided by the Diagram given 

 above, (which is meant to be a vertical section) will be sufficiently 

 clear and intelligible. 



The letters BB, are intended to point out a flue by which the 

 smoke from a furnace, applied to any ordinary purpose, is carried 

 off. By Mr. Jeffreys' plan, the top of this flue is closed up, as at 

 A., and the smoke, c^-c, pass, by a lateral communication, which 

 is here represented by the horizontal flue C, into another chimney 

 or flue D. On the top of this flue D, is fixed a cistern E, the 

 bottom of which is perforated with holes, the size of which will 

 necessarily vary according to existing circumstances, but they 

 should spread over the bottom of the cistern to an extent equal to 

 the area of the flue D, that the shower of water which is perpe- 

 tually passing down from the cistern, may be equally diffused 

 throughout. The cistern, of course, receives a supply of water 



