PS st ©. Oe ee oe © 
B. A. Gould on a new variable Star. 81 
able weather has Iwi egeece = magnitude this evening seems 
to be almost exactly the n 
The position ial the nti was at once seen to correspond 
very nearly with that of a star, No. 2765 of 26°, given by Ar- 
gelander in his “ Durchmusterung des siidlichen Himmels.” 
n observation of position, by means of a transit-instrument 
belonging to the Coast Survey, and temporarily in my posses- 
sion, corroborated the impression that these stars were identical ; . 
and now that the variable has waned to the 9th —— and 
no other small star is found to have been obscured by its excess 
es sepa it is manifest that the original suspicion was cor- 
here seems to be no regular observation of the star’s 
re on record. 
The determinations of magnitude during the time of visibility 
to the naked eye are rendered easy by means of a yet unpub- 
lished uranometry of the region between the declinations.+45° 
and —2°, prepared at the Dudley Observatory in Albany dur- 
ing the year 1858, in which the brightness of every star visible 
to the naked eye is given to the nearest tenth of a magnitude. 
This, however, affords the a values for no date subse- 
uent to Ma 19; and the comparison-stars for later observa- 
tions are still subject to some ‘pisattaegs which may affect the 
determination for the variable by a tenth or pega Ee Fas — 
nths of a magnitude. These will, however, be car 
termined before long by Mr. Cha ndler 
The Albany values for the iaigetness of the comparison-stars 
are these: 
M. 
« Corone, 2°0 | y Herculis, 3 5| a Serpentis, 4°6 
6 Herculis, 2°3 | 6 Corone, 3°5 | B. A.C. 5399, 5:9 
5 Boitis, 3°1 | 7 Corone, 3°6 | Bessel Z. 296,3, 6-0 
é Herculis, 3-4 | e Corone, 39 | B. A. C. 5452, 6-1 
For the variable, the magnitudes, as thus far determined by us, 
M. M. 
1866, May 14, 11° 2°9 | 1866, May 24, of 8678 
15, 9 3:5 28, 10 8-9 
19, 9 58 ot "0 8:9 
os 13 59 June 9, 10°.--- oe 
20, 63 
94 
Mr. Chas. A. Schott in Washington observed the star May 
24 and 31, and race a the magnitudes on those dates as 81 
and 8°7 respecti ively 
Since first eating public attention to the sudden appearance 
of this remarkable star, I have received from many quarters in- 
formation of its independent and, in several instances, previous 
detection; but only in a few cases do trustworthy ees 
tions of its magnitude appear to have been made. 
Am. Jour. Sc1.—Szconp SzRIEs, Vou. XLII, No. 124.—Junry, 1966, 
il : 
