Improved Galvanometer. 359 
By means of atreadle T, the rod R, and platform P, the bot- 
tle is, by the foot, pressed against a brass disk D, coated with gum 
elastic. In the centre of this disk are two holes, one of which re- 
ceives a leaden tube communicating with an exhausting syringe S, 
while into the other hole another tube is soldered, which extends to 
the bottom of an adjoining carboy of sulphuric acid. By means of 
the syringe, the bottle being exhausted, the contents of the carboy 
are forced into it by atmospheric pressure. 
The gum elastic’ being stretched over the disk, is secured by a 
clasp which is fastened round the periphery by a screw. 
This apparatus may be employed to raise liquors into a bar room, 
froin casks in a cellar, with this advantage over the pump now used 
for that purpose ; that the liquor does not pass through a pump. It 
has only to come into contact with a pipe of from one fourth to three 
eighths of an inch in bore. 
The attachment to the cask is easily made by a gallows screw sol- 
dered to the nozzle of a cock, or simply to a ferule which may be 
driven into a cork hole, punching the cork before it. 
The foaming of fermented liquors would be promoted by the ex- : 
haustion, lessening, for a time the atmospheric pressure on the car- 
bonic acid. 
3. Improved Galvanometer or Multipher, of an unusually large size. 
Seo SD Wiig 
< : CoO Z ZS 
——— Se ——— 
a 
This engraving represents a large multiplier, or galyanometer, 
