TJie Phosphates of America. 



135 



and devised the very practical scrubbing apparatus shown in the 

 annexed sketch, says that the mixer fumes possess within them- 

 selves every element needed for their speedy destruction and but a 

 single element (heat) to in any way retard it ; and this is quite 



true. He objects, therefore, to the introduction of steam, on the 

 ground that with every ton of superphosphate produced at least 

 five per cent, of water in the form of steam is evolved, and as such 

 a quantity is quite sufficient to saturate the effluent gases it is use- 

 less to employ any more. While a ''steam-jet will aid the draught ; 

 augment the agitation of the gases ; and hasten the purification of 



