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XXXII. Of the Litrameter. By R. Hare, M.D. Professor 

 of Chemistry in the University of Pennsylvania*. 



LITRAMETER is a name derived from « meter," and the 

 Greek Xngot (weight), and is given to one of the instru- 

 ments which I have 

 contrived for ascertain- 

 ing specific gravities. 

 The litrameter owes its 

 efficiency to the princi- 

 ple, that when columns 

 of different liquids are 

 elevated by the same 

 pressure, their heights 

 must be inversely as 

 their gravities. 



Two glass tubes, of 

 the size and bore usu- 

 ally employed in baro- 

 meters, are made to 

 communicate internally 

 with each other, and 

 with a syringe R, by 

 means of a brass tube 

 and two sockets of the 

 same metal, into which 

 they are severally in- 

 serted. The brass tube 

 terminates in a cock, to 

 which the syringe is 

 screwed. 



The tubes are placed 

 vertically, in grooves, 

 against an upright strip 

 of wood, tenoned into 

 a pedestal of the same 

 material. Parallel to 

 one of the grooves, in 

 which the tubes are si- 

 tuated, a strip of brass 

 SS is fastened; and 

 graduated so that each 

 degree may be about 

 equal to 1*110 of the 

 whole height of the 

 tubes. The brass plate 



* Communicated by the Author. 



2 B2 is 



