728 EAEL OF EOSSE ON THE CONSTEUCTION OF SPECULA OF 6-FEET APEETUEE, 
Number in 
Herschel’s 
Catalogue. 
1460 
1462 
1466 
1475 
1486 
1498 
1499 
1500 
1509 
1515 
1525 
1536 
1547 
1549 
1551 
1556 
1558 
1559 
1562 
1564 
j 1569 
I 1570 
i 1576^ 
1577 > 
i 1578 J 
; 1580 
1589 
1599 \ 
1600/ 
1604/ 
1605/ 
1622 
1626 
1638 '^ 
1639 > 
1643 j 
1647 
1650 
1658 
1659 
Number 
of times 
observed. 
1 
3 
2 
3 
11 
19 
2 
Description. 
April 25, 1854. mE. 
March 7, 1851. gvmbM. 
March 7, 1851. 8' long; E; centre vB. 
March 1,1851. Nucleus 2' s. of of 10th mag. At A112'‘43“ andN.P.D. 60°20'; “nova,” 
with nucleus ; E. 
March 11, 1848. Curious circular-shaped neb, with a dark and large spot at one side, 
around which is a close cl. of well-defined little *s. May 4, 1851. E. nearly p. 
and f. Herschel’s dark space is a curved passage, extending from p. round the f. 
side of the nucleus by the n. 
Feb. 16, 1855. L. B. ray; nucleus oval and vB; there is a involved in n. edge, a 
httle preceding the nucleus. 
Apr. 17, 1855. vF ; mE. sp. nf ; has a plainly seen at n. end, and either a or what 
looks more like a B. little knot involved in s. end. 
Numerous neb. arormd. 
Apr. 18, 1855. Looks sometimes like 838 when badly seen, with a B. E. patch in centre 
and dark spots on each side of this ; sometimes dark ring is seen all the way roimd, 
but blackest to right and left. The neby. round it is mottled. In looking for this 
I found at about Al. 12*' and a little n. of this set a F. d. neb. E. at right 
angles to each other. Mar. 29, 1856. Last year’s observation correct ; * in sf. edge ; 
sketched. Apr. 24, 1857. Long and carefully examined ; the B. centre is E. in the 
dii’ection of * on edge, and on either side of centre there certainly exist dark spaces, 
as before remarked, giving it the look of 838 ; yet sometimes I thought I saw it with 
a break in the outer annulus. 
Mar. 24, 1857. vvF ; IbM ; vlE. np, sf. 
Apr. 27, 1854. vF; E. 
Apr. 18, 1855. Like a distant cl ; 2 B. *s involved. 
Mar.12,1852. B.lenticular ray with E. centre. May 3, 1858. Sketched; hke 2172 and 1357. 
May 3, 1856. ghM ; B. nucleus ; B. * in np. end. April 15, 1858. Very much mottled. 
Aj^r. 22, 1854. E. p. and f; hM. 
Spiral ? 
cl. 
Mar. 12, 1852. Light equable ; E. sp, nf. 
Mar. 24, 1857. vF ; IbM ; IE. 
Mar. 1, 1851. vB. centre ; has an appendage parallel to major axis, 
cl. 
Spiral ? darkness sf. nucleus. 
A group of 4. 
Apr. 25, 18.54. E; bM; between 2 *s. 
Sketched three times. Apr. 29, 1856. The B. centre is E. but not in the direction of the 
neb. The whole neb. is much mottled. Apr. 15, 1858. I can add nothing to my 
drawing and obseirations of last year, which are fully confirmed. See fig. 28, 
Apr. 13, 1855. Both are S ; E ; pB ; bM. Apr. 17, 1855. There is a [Plate XXVIII. 
3rd vF. neb. nearly n. of the f. one of these two. 
Mar. 28, 1856. 1604 is IE ; pB ; has nucleus ; and a * at np. end ; 1605 is E ; _ 
vF ; and its hght equable. 
Carefully observed since drawing published in the ‘ Transactions’ for 1850. The 
outer nucleus unquestionably spiral, with a twist to the left ; thus 
Apr. 19, 1855. Oval ; bM ; # np. May 3, 1856. About 5' nf. it is a vF. nebs. knot. 
May 3, 1856. 1638 is E; nearly p. and f; bM; 1639 is S; E; bM ; 1643 is the largest; 
pB ; Pt. and gbM ; nucleus, round which I suspect dark spaces. __ 
Apr. 19, 1855. Not L; gbM. to a nucleus; mottled. 
Apr. 19, 1855. L; pb ; B. nucleus; seen as in sketch, but not cer- S ^ ^ 
tain whether the lower branch joins the nucleus, or is only the 
continuation of the upper curve. Mar. 21, 1856. The p. arm 
does appear to originate from the nucleus, which is vB. and oval- 
shaped. Mar. 30, 1856. Seen as before. See fig. 29, Plate XXVIII. 
Mar. 28, 1856. F. ray n. and s ; no nucleus ; light ; equable. 
Mar. 24, 1857. S ; vF ; nearly E ; brightest part is on sp. side of centre. 
