208 Scientific Intelligence. 
ArT. XXXII. —Discovery of a New Planet ; by C. H. F. Perers. 
(From a letter to one of the Editors.) 
In the night of February 3-4, in revising one of my Zodi- 
acal Charts, I found a star that I could not have omitted, as 
being of the tenth magnitude. Some measures therefore were 
immediately taken, which showed that the object is a planet 
hitherto unknown. Its position was, 
Feb. 3, 13" 46" 478 m. t. a@=10" 1™ 38*-08. 6=-+11° 23’ 34”°1, 
from ten comparisons with Dm. +11°.2173,—the place of this 
star being determined by differentiation from LL. 19882, of 
which there are several modern determinations, viz: W. 105.91, 
R. 3090, Arg. +11°.2190, Berlin Mer. Cir. in A. N., No. 1388. 
Last night it clouded up, before the planet could be re-ob- 
served. But from the measurements of the preceding night fol- 
lows the hourly motion —1*-75.and 4-270, or the daily motion 
—42s and +11’, so that there will be no difficulty in finding 
the planet again, it having now already entered upon Chacor- 
nac’s chart. 
There has been some confusion of late in the numbering of 
planetoids, arisen from neglect of prompt communication. But 
it seems this new member will’ have to carry the number 180. 
If the priority of discovery remains to me, I propose the name 
Hunike, in commemoration of the glorious victories won by the 
Russian armies in their strife for humanity. 
Litchfield Observatory of Hamilton College, Clinton, N. Y., Feb. 5, 1878. 
ed 
SCIENTIFIC INTELLIGENCE. 
I. CHEMISTRY AND PuHysics. 
y 
ties, founded upon the well established a 
‘d- not miscible with a given liquid are distilled with this 
ui gv 
liquid, the quantity of the two bodies in the distillate, is, at @ 
constant temperature of ebullition, in a constant ratio. Since, 00 
the mechanical theory of gases, the vapor-tension, other things 
being equal, depends on the number of molecules which the vapor 
sions of these constituents in the vapor mixture. results 
confirm completely the hypothesis and establish the ——— 
law: The ratio of the quantities of the substances in the disti 
late, expressed in molecular weights, is equal to the ratio of the 
vapor-tensions of these constituents in the vapor mixture, meas- 
