Chemistry and Physics. 131 
I consider the above experiment, though not decisive, yet a 
very powerful argument against the hypothesis of the vesicular 
ion. 
y I here be permitted to recall another experiment, which I 
have described in the eighth series of my investigation Sur les fig- 
ures dequilibre Pune masse liquide sans pésunteur. One of the 
the part of the fluid envelope to a considerable pressure, the effect 
of which would be that this air would gradually dissolve in the 
envelope, and would traverse it, by which the vesic e would soon 
of 1 part of Marseilles soap in 40 of water, and this is allowed to 
hg in an atmosphere laden with aqueous vapor, it sometimes 
are "nh more than twenty-four hours and becomes quite black. 
kabl 8 se 
calotte gradually decreases mae ultimately disappears,—from 
Which it follows that the enclosed air has gradually traversed the 
amina, This lamina is indeed far thinner than a vesicle would 
be; Dut, on the other hand, theory shows, from the difference of 
the liquids and the diameter, that in the interior of a vesicle the 
t 
ned a new substance isomeric with ethylic nitrite. When 
ethylic iodide is poured upon argentic nitrite, violent ebullition 
"sues, To complete the reaction, the mixture may be heated for 
ondenser. On distillation, a mixture 
lalca. 3 y the name of nitro-ethan. It is a perfectl colorless, 
car liquid, of a peculiar agreeable, etherial odor. Its density at 
w 
of ethylic nitrite, the boiling point of which is 96° C. lower. When 
'tro-ethan is heated with iron filings and acetic acid, a violent 
““ton ensues, which must be moderated by plunging the flask 
su 
at an corresponds to the aromatic nitro-compounds. e 
be ton between th 
Y the formulas: 
€,H,—6--N@. O.N- 6.8: 
Ethylic nitrite (B. p. 16°C,). _ Nitro-ethan (B. p. 111°-113°C.). 
