52 W. P. Dexter on a Gas Regulator. 
Gas re 
of heat in laboratories, it is desirable to have a means of kee 
ing ane ‘pressure constant, and independent of the chang 
Ss The arrangement which I have had in use for the last y 
consists of a common gasometer, made of zinc, and about 
inches in height and diameter. The floating bell is connect 
and be in proper proportion to the diameter of the tube, which 
may e 
tor.—Now that De is universally used as a sour 
place in the mains. 
tor T ected with several burnet! 
whole laboratory, if the gas pipes are 
