204 A, Gautier on recent Researches on Nebula, 
tory of Bonn, by Messrs. Schénfeld and Kriiger, in 1855 and 
1856, and in America, by Mr. Tuttle, in 1859. It was then vis 
ible with a comet seeker of 84 lines aperture, but in 1862 Mr. 
D’Arrest found that it was seen with difficulty at Copenhagen 
with the great telescope of his observatory. 
Mr. Schonfeld, acting director of the observatory of Mannheim, 
published in No. 1391 of the Astr. Nachrichten a notice of the 
observations upon nebule recorded in the surveys of the heay- 
ens by zones made at the observatory of Bonn, in which he de- 
nies the variability of the light of this same nebula of Taurus, 
which,he had observed without difficulty, in September, 1862, 
with a telescope of eight feet focal length. The author regar 
the variability of the second nebula of this kind in Taurus as no 
more certain than that of the one discovered in 1855 by Mr 
Tempel, in the Pleiades, near the star Merope, and designated as 
variable by Mr. D’ Arrest, in No. 1878 of the Astr. Nachrichten, 
Messrs. Chacornac having also observed it with him, in Septem- 
ber, 1862. Mr. Schonfeld considers that the variability of the 
atmosphere and of the eye of the observer may occasion very 
fused ligh ry 
Doctor Auwers, astronomer at Gdttingen, in a letter which 
follows the preceding article, takes the same view as Mr. Schon 
feld. From his own observations, made at Kénigsberg in 1858, 
pecans impressions from nebul of feeble and somewhat dit 
t. 
and at Géttingen in 1861, he admits indeed the variabili of 
the light of the nebula discovered in Taurus by Mr. Hind ia 
1852, which appears to have attained its greatest brilliancy 1m 
I but he‘does not cre 
ones, the field of vision of these last being in general uite ade 
ited.” He adds that in September, 1862, he clearly distinguish 
ed the two nebule in question, with a comet seeker of two 
focal length : 
Dr. Auwers has also inserted in No. 1392, Astr. Nachr., cata 
logue of the exact positions in 1860 of forty nebulae as oboertes 
with the heliometer of the observatory of Kénigsberg- *" 
mm the catalogues already published by Messrs. Langier 
-D’Arrest. These comparisons do not appear to show vad 
changes of position. 
_ Doctor Winnecke, ina letter dated at the Observatory of Poal- 
kova and inserted in No. 1397 of Ast. Nachr., confirms 
ea Pa i eee ee ee ee ed 
son announced above, that small telescopes frequently enable: ee 
> ES 
