115 
condensation was not in the centre of the nebulosity, but 
towards the north following side. The tapering elongation 
of last night was now a narrow 
and slightly fan-shaped tail of 
"2i degrees in length, but appa- 
rently separated from the nebu- 
losity of the head by a remark- 
able and comparatively dark 
interval, as shown in the sketch 
which accompanies this paper. 
The point of origin of this sin- 
gular tail was estimated to be 
from 12 to 15 minutes distant 
from the centre of the head, 
and its breadth at this part was 
about 4^ minutes, and at its 
extremity about 15 minutes. 
Its axis was perfectly straight, 
and its brightness was greatest 
at the narrow end, where it 
was equal to that of the nebu- 
losity of the head at two-thirds 
of the radius from the centre. 
May 5th. At lOh. 16m. 
59'7s. G.M.T., six comparisons 
with Lalandes 191G8 gave the 
comet’s apparent place R.A. 
9b. 39m. 37‘82s. Dec. + 41° 
21' 34-5". 
The sky to-night was not 
very favourable for the obser- 
vation of faint objects, but the 
general features of the comet 
did not appear to have under- 
gone any material change. Last 
COMET I, 1861, 
As seen with Mb. "Worthington’s 
13-inch Reflector, Mat 4th. 
