Chemistry and Physies, 129 
SCIENTIFIC INTELLIGENCER. 
I. CHEMISTRY AND Puysics. 
+ An aaperisnent in reference to the question as to Va apor- 
a re T. Prat Mier a resea cai of J niet ap pe it is 
contact with this surface, the air in it, in virtue of the pressure of 
the envelope, ae penetra penetrate into the interior of the 
liquid, and will rise in it in virtue of the smaller specific gravity. 
This I have dae vies by means of an experiment. I took a small 
glass tube of about 4 millims, diameter i in the clear, drew it out at 
di , 
the wider end by a cork coated with grease. By touching the 
drawn-out end with a piece of filtering paper, wily was soaked 
with distilled water, I succeeded in ee i into the narrow aper- 
ture a column of this liquid not more than a cities } in length, 
By eerily teprooting the cork, a hollow bubble is seen to form 
€ drawn-out aperture, whic hm may have a diameter of less 
ae a millimeter, and usually lasts seven or ight seconds. In 
this nna the wider part of the tube m t be covered with 
quired the power of procuring very small hollow yates oe AEA 
. . e 
ub 8 0 
Such a small diameter the suspension is very easy. It is only 
necessary, after filling the tube with water and closing the mouth 
With a piece of aper, to invert it and then draw the paper aside 
ontained in it —— and ascends in the liquid. The 
periment repeated several times, always gave the same result. 
now assume ‘that at a certain distance below the surface 
of the Suspended water there is a current of visible aqueous vapor; 
if this Vapor consists of vesicles, each of them, on coming into con- 
tact with the surface, will introduce a mic roscopi¢ air-bubble into 
the water, which will immediately ascend in it; and the whole of 
*“Mém. sur un cas iat ed de ref des liquides,” Mém. de l’Académie 
and xx 
a de = tre vol. xxvi, 185 
UR. Sc1.—Turrp eam Vou. IV, No. 20.—Avaeust, 1872. 
9 
