AMERICAN INSTITUTE. 



165 



it is turned to draw water for use, an operation easily compre- 

 hended and performed by almost any " drawer of v/ater." h, b, 

 are stops on tlie bottom of the filter, to restrict the motion of the 

 handle b. The flow of water through the filter in either direc- 

 tion is stopped, by turning the handle b into the intermediate 

 position between tlie stops h, h. There are small holes, 1, in the 

 cylinder, B, to allow tlie water to pass, either ])efore or after it 

 has passed the felt. 



The arrangement here described gives a large filtering surflice 

 within a very limited diameter, and by means of this device for 

 reversii]g the current, it is easily kept in order. 



[^■J hronze medal awarded. 

 Cochrane^ Wa/er Metre. 

 James Cochrane, No. S Tenth street, near Sixth avenue, New-York. 



Liberal supplies of water in 

 cities, are blessings which can 

 not be too highly appreciated. 

 To prevent waste, however, the 

 necessity of some method of 

 recording the quantity used in 

 eacli iKHiseliold or establish- 

 ment, is vejy much felt, and 

 various methods have been 

 adopted f (reflecting this result. 

 None, however, measure with 

 absolute mathematical ])erfec- 

 tion; some are quite expensive, 

 and nearly all have stuffing 

 ^ bo?Les, packing, or the like, 

 rendering them more or less 

 liable to get out of order. 

 The meter represeiited in 

 '^ the accompanying engravings, 

 an apparatus recently invented 

 b} James Cochrane, of this city, 

 is so arranged as to require no packed part, to work practically 

 independent of friction, and lo ailord a means of measuring with 



