390 Scientifie Intelligence. 
the President of this Conference be requested to communicate the 
above resolution to Congress anh 3 the proper official channels. 
Resolved, That the U. 8. Electrical Commission conducting this 
Conference be requested to a ribs a suitable committee to repre- 
sent the Conference before Congress and to move for such legisla- 
tion as will secure the object of ‘these resolutions. 
ended discussion was had upon accepting the results of the 
International oy eho Conference held in Paris. With regard 
th A. L. Kimball gave the results of Professor 
Rawilaid’s srcelieat: as 106-278 centimeters for the length of 
the column of mercury one square millimeter in section which 
has one ohm resistance ; and Sir Wm. Thomson said he thought 
if the Paris Conference had had this result before them, it wofll 
have adopted 106°2 in place of 106. But this value is only pro- 
visional and the discussion may in a few years be reopened. 
e discussion on Dynamo-machines was the fullest of the session, 
that on Secondary Batteries coming next to it. The results of 
the Conference cannot fail to be of great value to electrical 
oe amore frequent interliniie of views similar to this: 
its character — contribute materially to a healthier and 
more read progre 
The Conference “adjourned on Saturday, Sept. 13th, subject to 
a" call of the cha 
ereaanere abe of Vapor density of bodies with low boiling 
ince and bodies with high boiling points.—Nix von Klobakow 
reviews the methods of previous observers and diessrliich an appa- 
ratus for the determination of the vapor density of substances 
with low boiling points, which in its general features resembles a 
weight thermometer. The details are fu lly described in his 
paper. means of this apparatus one can work with a very 
small quantity of the substance. If the weighing of the sub- 
stance can be depended upon to the fourth decimal place five 
milligrams of the substance will give precise results. He 
terms the instrument a vapor density dilatometer. In order to 
obtain the vapor density of substances which have high boiling 
cadoue vapor. This Sa raitioes is called a vapor-density ara- 
ometer. The results obtained by both instruments agree closely 
with the dee obtained by calculation._—Ann. der Physik und 
— No. 8, 1884, pp. 466-510 
3. mal peer for Electro metric measurements. _The sie 
of a sient practical unit of electromotive force has long been 
felt. The zine and parcery element of Lati mer Clark is very 
*The New York Electrical World published a very full and accurate report 
of the — of the Sietloreinals to which we here acknowledge our indebt~ 
edne 
