L. Boss—Tail of Comet b, 1881. 307 
We then derive the following table of results: 
TABLE II. 
June 26. June 28. July 1. July 
‘Tea. ee | Beg (owe bia eae ce 
Fag | Hos | S2g | Bae | seg | 288 | 32 | $3 | Seg | ses 
See | Sod | HES | SoS | HE | sao | 85 | ae | See | Ee 
ga5 2p 455 | 288 45% 284 z & c™ | 288 453 
- a o 4 ° 2 Fae] us o a = 
SN CNGR Polo te) Tae ee eNO oe TOis | 2s 
Do rade Fe: pied Rae ek Be eid Pee 3 ieee 
A 210 + 187 |: “17 161 | +189 | 15 130 | 110 | 0°82 | -057 
$ | 3%°0.131°:1 | 229-9 | 95°0 | 94°] | 19°39 11674 | 10°%4 2-90 | 3°9 
p° |345°6 | ___. ce 8 eal aloe UR BE a Ay Ga nS 
p | 861-2 | 351°8 50 | 3508 87 3:7 28 | 186 | 615 | T1-8 
S |102 opal aa 106 ae tras T2060 pect 
T | 40:2 | 391 | 24°9 0] 30°70 | 34: 51°8 | 32°9 |109°8 | 94:1 
@ | 1291 140] 298 66 | 32°91 | 9TO0 |} 2111 466 62 | 94:9 
31°3 
An inspection of the foregoing table shows that the char- 
acteristics of the two branches of the tail, as defined by the val- 
hid ; ‘ aap 
superior limit of visibility assigned by most observers for the 
extent of the tail on the respective dates. 
o far as I am aware most of the observers who have 
already reported on the appearance of the tail failed to notice 
the division into branches at all. On the other hand, it can- 
not be supposed that this interesting aspect entirely escaped | 
ing under proper conditions of sky and terrestrial sur- 
ings. 
line tail corresponds to the principal appendages of the great 
8 
present case the light of this tail is relatively far more conspic- 
uous. The branch of greater curvature finds its representa- 
