_ electrical potential of the a 
7o. . Scientific Intelligence. 
SCIENTIFIC INTELLIGENCE. 
I. Puysics AND CHEMISTRY. 
The diffusion of Gases and Vapors.—A, WINKELMANN has 
eanciaas the formulas of Meyer and Stefan in order to see if 
they agree with carefully conducted observations. His work 
included observations upon the diffusion of steam; the ostoals 
drawn out into a uniform tube of much narrower bore than the 
upper portion. This lower portion was graduated. It contained 
5S 
over it by an ee and exit tube led into the wider and upper 
part of the t 
F 
or the diffusion of steam in hydrogen, carbonic acid — 
and in air, Winkelman finds discrepancies between the results 
é. 1884, « 1-81, 
mos spheric. Electricity.—The conference of nloctriolnus 
held dane April at Paris has called forth various treatises on 
atmospheric Tevpeiaite: mong these is a pamphlet sg 
Continuous Observations on Atmospheric Electricity made 
a by Professor Antonio Roiti. The author discovered 
at the zero of Mascart’s electrometer changed from time to 
time ie believes that this change was due to the use of sulphuric 
pitas inner mas of the charging Leyden jar. He accord- ss 
“sata ithe tituted for the bifilar cocoon suspension of Mascart’s — 
electrometer a very fine silver wire which served to suspend and 
dle 
with the Leyden jar, and found the modified apparatus sufficiently 
stable. The pamphlet of Professor Roiti contains a diagram of 3 
the electrical observatory planned and occupied by him. He also 
appends specimens of the curves which represent the changing 
r. He i 
simultaneous observations of atmospheric electricity unless great 
care is taken to eliminate local disturbances.—Pubblicazioni del 
“3a seems di Superiori Pratici e di Perfezionamento di Firenze. 
Shatter brochure on the subject of Atmospheric Electricity by 
Borate 
Ka CPA, 
