Sir I send you the result of the observations of the great Comet of February 1843, made by Mr. Walker an4 myself with the f i a u n h o f ~ Equatorial at the Observatory of the Ceirtral High &hool. Latitude 390 57' 8". Luogitude 5h Om 4isg of Greenwich.
The measures were all made with the lii.aanhufm Fjlarmicrometer, power 75 except on the 9th and 10th of April when the extreme faintness of the Comet compelled us to use the Ring-Micrometer. We first MIV the nucleus 00 the 11th of March, and brought the Comet to the centre of the field and read the graduations. The place given 011 that evening is liable to an error ot 2 nlinutes of space. That of the 10th of April is liable to an error ot about minute of space, Those of the other evenings were the result of satisfactory measures. The nucbus, on the i i t h of March was near the star {Ceti of the third magnitude and was of about the same brightness. The tail extended between Rigel and Sirius, about one degree South of its position on the 18th when we saw it and also the nucleus but made no measures. I n the Comet searcher, the nucleus appeared on the 11th with a well defined disc larger than that of Jupiter in the same instrument. In
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the 9 feet equatorial it had no appearance of a disc, but only of a nebulosity gradually condensed toward the Centre, So that it was impossible to distinguish any nucleus. 1 have no doubt that this comet was seen in the day time on the 28fh of February and 1st of March. The particulars are stated a t length in Professor SiUirnan's Journal. An observer at Woodstock, Vermont saw the nucleus and tail in a good telescope probably a 34 feet Dollond. Mr. Clark of Podland, Maine, a teacher Of Navigation, measured its distance from the sun's limb a t the time Of culmination and found it to be 6' 1sy "1. Professor Loomis of Western Reserve CohY% Hudson, Ohio has computed the intensity of the comet's light on the 2Sth of February, and finds it to have been 24 times brighter that1 O n the 11 of March that is 24 times brighter than a star of the third magnitude. *) In dem versiegeltcn Brief war ein Zettel eingesteckt, auf dem folgendee eteht : To Professor Sehunuccher. --After sealing aspertained that Mr. Clark's distawe of the Comet from the sun's limb wm 4'6f. E. 0. K. 388 Comet's apparent. Dato.
No. Siderial Time Right Aacene Declinalion.