50 FILTERS. 



Company, at 157, Strand, being the invention of 

 Mr. Danchell. 



This filter, which is only 3 inches in diameter, 

 is constructed upon the syphon principle, and by 

 means of a system of ascending currents the sus- 

 pended impurities are separately precipitated 

 outside the filter, whilst those only which are 

 held in solution actually pass into the filtering 

 material, the water being purified from these in 

 the act of ascension. A case of galvanised iron 

 contains the filtering material animal charcoal 

 which is the best medium for purifying, as it is 

 incapable of communicating any taint to the water 

 passing through it, retains its purifying properties 

 for a long period, and is everywhere easily pro- 

 curable. 



The action of this system is so simple that no 

 attention or trouble is required in its manage- 

 ment; it never clogs up, and is so arranged 

 that the animal charcoal is easily got at for 

 cleansing or renewal. 



