Memoir on Sulphuric Ether. 461 
Balloon containing 404 cubic inches=123 
grains of air. 
Barometer 30 inches. 
Ether .728 specific gravity in the temperature 48°. 
Manometer. Measures of Ether 
evaporated. 
1819. Feb. 25.. 10:A..M. ss. 4100 s.sece. 0 
V3. M.. as. A052 ~ co ccccces 8— 
gz ore OHO 5 oie 9.5 
3 cD lade See 1 
5} a 000-7),,, 8.22 13.5 
ie las, BORO dieac..t 15 
9 i ge66) 3.23.0 17 
26. 9 A.M. .- 3908 ° 4... deve’ SO 
Jiao) psigadeds. tal bam 4 
Bie, Bde (BOO Keren ad pine 2B 
Gee 1) SRST Oe, ae 
1G ess, TO. orsake ne 32 
7 FAM. .co SOON ee a 
Pa. > GOLD AVES. os OD 
At this period the cock was turned and the 
air and vapour let out, till the equilibrium 
was restored with the atmosphere, the baro- 
meter being then 29.5; the thermometer 
was not noted. Ina few minutes the cock 
was again turned and the experiment con- 
tinued. 
