128 Scientific Intelligence. 
The longitudes of the perihelion and node are not reduced to 1850, but 
belong to the mean equinox of their respective years 
Perih. 
“| |Long. asc. gaat 
{Date of Perit p pas. ae he keda erih, |. iael. dist: Boy 7 ‘Gonipatiee stir and inte time. — 
A.D. 770.June 66. | 899 a o loos | R. Aimnd. iDec. 1845. 
962. Dec. 30°16, | 350 35'|/ 268 3/179 33'/0°5518 | R. |Hi Jan. 1846. 
H. 1378.Nov. 8°76 47 17 |299 31/17 5605835 |R. |Laugier, (May 1843, 
1468.Oct. 7-41 61 15/356 3/44 19 (0°85328|R. ‘Laugier. Jan. 1846. 
siege 24-47, | 288 58 40 [51 = 0-7376 | D. longi pes 1846, 
Sept. 3°662.) 132. 50°! ae 37 45 038598 | R. . 1846. 
1668. Feb. 28:8.. | 357 17° 2 135 58 '0°004786) R. Hed: “Apr. 18 1843. 
Prof. Peirce’s catalogue contains 174 comets, reckoning that of April, 
1556, as identical with that of July, 1264, and that of Aug. 13, 1770, a 
he with that of October, 1585; and omitting in the enumeration 
a of May 14, 1846, (discovered too recently for asihecter we have, 
Nake to the middle of 1846, 184 different ebineth whose elements are de- 
mined with more or less ce rtainty. The whole number of which we 
ay any record i is about 600. 
4. Le Verrier’s Planet.—In our last number (vol. ii, p. 439) was an- 
nounced the Risberg of the planet aac: Uranus, in "accordance with 
the predictions of Le Verrier. This discovery must be considered one 
of the most remarkable naga in the annals of science, and elevates Le 
Verrier to the first rank among astronomers. Of its history, we have 
room at present only for the following brief sketch. 
Omitting to cite various notices which indicate that for several years 
past there has been among ttronomers a growing suspicion of the exist- 
ence of some unknown body in our system, by which the motions of 
co Ap is disturbed, we may quote lle following as one evidence. 
he Comptes Rendus Acad. Sci., "igen re Sept. 1, 1845,) xxi, 524, 
is 7 revhoka from the preface to New Tables oF ‘Uranus, by “ered 
Bouvard, communicated to the Academy, in viwhich, after speaking of the 
impractibility of reconciling, by any existing theory, the computed and 
the observed places of this planet, he adds: ‘“‘the discordances between 
the observations and the theory induce me to believe that there is much 
probability in the idea proposed by my uncle, (Alexis Bouvard, whose 
tables of Uranus, &c. oer printed in 1821,) as to the existence of another 
shanti disturbing Uranus. ‘This opinion, moreover, is further strength- 
ened by the analogy wtih appears in the periodicity of these discordances, 
— Re which Saturn would present if we should suppose Uranus un- 
si an session of Nov. 10, 1845, (Comp. — xxi, 1050,) Mons. U. 
. Le Verrier presented his First Memoir on. the Theory | of Uranus. 
Having alluded to the discrepancies heteaen he observed and computed 
places, he says, ‘‘in the course of the last year, M. Arago roped to 
me that the importance of this question made it the duty of every astron 
omer to do his best to clear it up. I abandoned at once, in order to 
vestigate Uranus, the researches on comets which I had undertaken, and 
of which several portions have already been communicated. Such is the 
* This may be the same as Prof. Peirce’s No. 23; yet the orbits differ widely. 
