32 =F. J. Parsons—Elliptic Elements of Comet 1882, I. 
but he would like us to compare his results with ours. We did 
so and found that some strongly marked details could be made 
out on his drawings, a rift near the north pole being especially 
noticeable. This was in a photograph taken on April 3d, in 
which details of the northern hemisphere are best shown ; while 
the details of our southern hemisphere most resemble the photo- 
graph taken on June 6th. In fact our negatives seem to hold 
an intermediate position. Afterwards I went with.Dr. Hug- 
gins and Mr. Woods to Burlington House to see the negatives. 
The outline and distribution of light in the inner corona o 
pril 3d is very similar to that on our plate which had the 
shortest exposure, the outer corona is, I think, hidden by at- 
mospheric glare. As a result of the comparison, I should say 
that Dr. Huggins’ coronas are certainly genuine as far as 8’ 
from the limb.” 
Art. VL—Elliptic Elements of Comet 1882, 1; 
by F ARSONS. 
THE accompanying set of elements was derived from the 
following six normal places: 
Mean R. A. 
Prob. |No. of Mean Prob. ‘No. of 
1882.0. 
Time = Normal 
Error. | Obs. 6 1882.0. Error. | Obs. 
places. 
G, M. T. 
iach 26.5 |271 36 46°99 |4+0°Tl| 63 [37 15 15°6)/4+0°41| 61 |Mar. 19—Apr. 3 
April 12.5 \281 22 16°7 |+0°20) 70 |49 49 16°1/+0°66) 70 |Apr. 4—Apr. 21 
May 25.5} 55 55 +0°45| 40 159 36° 4:1/+0°28) 40 |May 21—May 28 
rh 2.5 | 66 45 42°3 |40°56) 18 (44 36 27°1)/40°53) 17 |June 1—June 5 
9 * 
4 
27 |July 8—July 17 
12 |Aug. 1-Aug. 16 
August 7.5 |181 46 55°5 |4+1°17) 12 14 3°7/4+1°3 
From the 2d, 8d and 5th of these normal places a prelimin- 
ary set of elements was co mputed 9 to the methods 
given in Gauss’ ‘ Theoria Motus,” as follow 
T= June 1052908 O=204° a 18”°6 M 
log g=8°7836381 ws 59! sais ean eq. 
log e=9°9999998 73° 48" 34"-g5 ) 1882°0. 
Rectangular equatorial I Coordinktes 
=F fe soso i sin ce 32 $3°° 24+) 
y=r [9°8608368 61° 11’ 4756+ 
z=r |9°9021136 196° 51’ 24°51 sa 
With these elements considering the eccentricity equal to 
unity, comparison was made with all six normal places, in 
order to make the final cnbecdon: to the preliminary orbit by 
means of a least square solution. 
sin 
