132 * Scientific Intelligence. 
of the vesicle. 
IV. Astronomy. 
1. The Planet Neptune, and its Relations to the Perturbations of 
Uranus.—In the Boston Courier of April 30, 1847, Prof. Bensamin 
Peirce, of Harvard University, announces the following conclusions : 
“ The problem of the perturbations of Uranus admits of three solu- 
tions, which are decidedly different from each other, and from those of 
LeVerrier and Adams, and equally complete with theirs. The present 
lace of the theoretical planet, which might have caused the observed 
irregularities in the motions of Uranus, would, in two of them, be about 
one hundred and twenty degrees from that of Neptune, the one being 
behind and the other before this planet. If the above geometers had 
fallen upon either of these solutions, instead of that which was obtain- 
ed, Neptune would not have been discovered in consequence of geo- 
metrical prediction. The following are the approximate elements for 
the three solutions at the epoch of Jan. 1, 1847 :— 
; Il. : 
Mean longitude, - - 319° 19 193" 
Long. of perihelion, - - 148 =. 219 188 
. Eccentricity, ° ne ES oF 0°16 
In each of them (the mass of the sun being unity) the mass is 0-0001187. 
The period of sidereal revolution is double that of Uranus. It will be 
observed that the mean distance in all these cases is the same with that 
sidual perturbation, but leave it full as great as it was previous to Galle’s 
