94 Proceedings of the Royal Society 
to the Society, which I there surmised to be the new planet. I find 
that these stars were generally observed only once. The dates are 
not given in the catalogue, but they all lie on one great circle quite 
close to the ecliptic. They have never been observed by other 
astronomers. The mean position of these three stars is about lOh. 
39m. RA. I believe that the mean time of observation of these 
stars was about the year 1835. In 46 years the new planet would 
move over 15*5°, or lh. 2m. This would make the present 
position of the new planet = llh. 41m., agreeing within 1m. of the 
theoretical time. 
4. On some Effects of Rotation in Liquid Jets. By 
Professor Tait. 
The author had noticed that a jet of mercury from a funnel, 
falling horizontally and nearly tangentially on a slightly inclined 
glass plate, seemed to roll upwards along the plate. Attributing 
this to a rotation of the jet, he endeavoured, with success, to re- 
produce the phenomenon with water jets escaping from a rapidly 
rotating tube, and falling on a slightly inclined glass surface covered 
with a thin layer of paraffin. 
Another curious fact was observed when the efflux was slow, and 
the tube rotated very rapidly. The water, on escaping from the 
rotating tube, instead of proceeding as a jet, crept round the fixed 
tube in which the rotating tube was enclosed, and escaped by 
dropping off at a distance of nearly half an inch from its open end. 
5. Note on the Influence of Temperature-Change of Con- 
ductivity on the Conduction of Heat in Solids. By 
Professor Tait. 
(The substance of this note is incorporated in the first of Professor 
Tait’s papers of February 7, below.) 
BUSINESS. 
Sven Loven, Director of the Museum and Professor of Natural 
History at Stockholm ; Simon Newcomb, Professor, United States 
Navy, Washington; Emile Plantamour, Professor of Astronomy, 
