i 
30 IMPROVED CYROPHORUS. 
product; yet more or less may be obtained by refrigeration 
with cold water. 
It may be proper to mention, that at the bottom of the phial 
an aqueous acid liquor is deposited, upon which the ether 
swims, and from which it should be carefully separated. 
ART. v.— IMPROVED CRYOPHORUS. By R. Hare, M. D. 
Professor of Chemistry in the University of Pennsylvania. 
Two flasks, of which the necks have flanged orifices, are so 
secured in a wooden frame, that by the pressure of screws S S, 
and gum elastic disks, the oriflces of a tube are made to form 
with them severally, air tight junctures. The orifices of the 
tube are furnished with brass flanges, which correspond with 
those terminating the necks of the flasks. 
Midway between the junctures a female screw is soldered 
to the tube for the insertion of a valve cock V, by means of 
which, and a flexible tube extending to an air pump, the flasks 
may be exhausted, and then closed. A small quantity of water 
having been previously introduced into one of them, if, while 
