368 Mr. Taylor on the Smelting of Tin Ores , 
increased. Tin, though volatile to a certain degree, is not affected 
by the process in any important manner, but as some flies off in 
white fumes, it is usual to construct a long horizontal flue, which 
is made to communicate with and pass through a kind of chamber, 
in which a considerable part of these fumes is condensed and 
collected. 
