324 Mr. Bowditch on the Comet of 1811. 
i b-' . obs. lat. |Calcul. lat. 
servitiot Salem, Pesctena longitudes | Differences. || “North. | North. | Differences. 
ilid.A.’ "| St AOE WI HS PO FE ROD Te eee 
Oct. 18 7 56 52)225 53 58225 51 412 17 62 23 52/62 23 1610 36 
19 7 56 52/229 41 17/229 41 39) —O 22)162 10 30/62 12 09 —1 39 
21 7 56 52/1237 07 57/237 06 171 40 61 31 55,61 32 33 —O0 38 
23 7 56 521243 56 48244 03 09 —6 21/150 32 01]:0 32 04 —0.03 
27 7 56 52/236 02 04256 03 48} - —1 44157 49 35/57 45 1014 23 
28 6 25 40} —2 411/57 00 21/56 59 3110 50 t 
29 6 25 40 —1- 38/55 00 18|56 08 31 —9 33 
30 6 25 40}: —O 07||55 17 53)55 16 34]i 19 
Novy. 1 6 25 40} —1 38/153 29 06/53 28 39)/0 27 — 
2.6 25 40}: —1 01/52 25 26]/52 33 38} =9—8 12 
36 25 40 —O 47)/51 36 40/51 38 15 —1 35 
46 25 40 -10 591/50 45 01/50 42 4912 16 ds 
10 6 25 40}. 45 14.45/45 16 22} —1t 39 
11 6 25 40f/2 2 49/44 23 51|44 24 10 —0 19 
12 6 25 40f2 43 32 41|43 32 50 —O0 08. 
17 6 25 4c}: —5 111/39 26 42!39 30 O05 mong Se 
18 6 25 4 38 42 59/38 44.29]. —1 30 
19 6 25 40 37 58 17/37 59 53 int 36 
21 6 25 40 35 56 33/35 52 05/4 48 
24 6 25 40 —4 14//34 56 14/34 31 45/4 29 
Dec. 4 6 25 40 —O 13//28 44 52/28 43 40]1 12 
6 6 25 27 43.05/27 43 38, = —03F 
9 6 25 40 26 15 03/26 18 49 —3 46: 
10 6 25 4C 25 49 33/25 51 53 —2 18: 
11 6 25 40, —1 41)/25 30 05/25 25 3114 34 : 
12 6 25 40 los 04 57/24 59 48]3 09 
16 6 25 40 . 23 25 17/23 22 4112 36 
20 6 25 401307 49 48/307 43 18/4 30 llet 57 13}21 54 ool3 13 
Sums 41 26-41 26 
Sums 35 52-35 52 
It would have been in vain to have attempted to calculate the ellip- 
tical hypothesis by these observations, since the differences between 
the observed and calculated places are, in general, within the limits of 
the errors of the observations. 
The tail of the comet was bifurcated, and’ near the middle part 
of the space between the two forked points the colour was as dark as: 
- the unilluminated part of the heavens, as was observed by Rev. Dr 
Prince of Salem. The apparent angular length of the tail increased 
from. its first appearance in September till near the middle of October> 
