720 EAEL OF EOSSE ON THE CONSTEHCTION OE SPECHLA OE 6-EEET APEETIJEE, 
Niunberin 
Herschel’s 
Catalogue. 
Number 
of times 
observed. 
705 
706 
1 
710 
5 
711 
4 
713 
1 
714 
2 
718 
1 
719 
2 
720 
2 
721 
2 
724 
6 
727 
1 
728 
5 
731 
12 
732 
1 
735 
1 
737 
4 
739 
8 
765 
766 
768 
772 
773 I 
775 J 
774 
777 
778 
779 
782 
783 
785 
78 
?} 
14 
r 
1 
r 
Description, 
March 3, 1851. d. with neb. to n. 
Looked for 5 times ; not found. 
March 11, 1858. 2 F. patches of nehy. (of which one has nucleus); they form with a* 
an obtuse-angled triangle, the intervening space being filled with E. nehy. of a 
mottled character. 
Feb. 18, 1852. pB ; bM ; E. sp, nf. 
hM. 
March 20, 1854. Dark spaces suspected. Feb. 9, 1855. Has a suddenly B. centre; vmE. 
Has a * closely sflF. 
Bather lenticular. 
March 18, 1857. sp. edge is F, and not so sharp as the rest. 
March 18, 1852. B ; nucleus. 
March 8, 1858. There is a B. streak, in which I certainly see *s sparkling, projecting 
a little from the edge of neb; the neb. is much mottled, and has a stellar nucl. 
March 11, 1858. F;B;hM. 
Jan. 10, 1856. I think the nucleus is not quite central. 
March 5, 1848. Spiral arrangement weU seen. March 11, 1848. Yery cold; very windy; 
air steady; definition excellent; mirror bore a power of 700 with great precision; 
telescope as steady as a rock, although vrind so high. Nebula weU resolved into 
^ points. Saw a broad band at the bottom distinctly, and 2 at the top. March 28, 
1848. Besolved by a power of 800, although night hazy. March 17, 1849. Like cl. 
in Hercules ; dark spaces in B. part. 
Between 2 *s, one of which seemed connected with the nebulae. 
Nucleus or in centre ; S ; B. 
March 18, 1857. Mottled; suspect 2nd nucleus. 
Jan. 27, 1852. vF. spiral with B. centre ; S. ^ sf. centre involved; two others f. 
Both have B. L. centres enveloped in F. nehy ; much mottled. 743 sketched roughly 
twice. 749 sketched roughly four times. They are both represented as spirals, 
though the details are vF. 
Mar. 23, 1851. The triple neb. is probably a spiral; dark spaces in it. 
Feb. 1, 1856. IE; pB; mbM. 
Feb. 23, 1857. mE. n. and s ; bM. 
B. streak through it suspected. 
r757 vB; L; B. 
March 17, 1849. ^ 758 vB; B. 
[761 E; pB. 
Feb. 9, 1855. 765 is, I think, a spiral, with left-handed twist ; immediately f. is 766, which 
is B. and well-defined. I suspect F. nehy, extending from 765 and running up 
through the other nebulae. Feb. 14, 1855. Seen as before. In 765 the curve to the 
left is brightest near its extremity. Feb. 16, 1855. Certainly F. neby. extends be- 
tween the two, as before suspected. Jan. 10, 1856. Nothing to add to former obser- 
vations. Mar. 19, 1857. Observed to compare sketch. See fig. 15, Plate XXYII. 
Nucleus. 
Another neb. n. 3' dist. 
Both mottled. 
Sharp nucleus ; * in nf. edge. 
Mar. 29, 1856. A *• in s. edge, and a F. one in f. edge ; 2 knots in n. edge. I think it r. 
Feb. 9, 1855. Three in a line ; the middle one is vB. and lenticular, and has the larger * 
of a d. * involved in f. end. 
vF; IbM. 
'iMar. 5, 1851. At sp. edge of 787 a ring suspected, vrithin which a dark band, «• 
I then B. part. Mar. 30, 1856. 785 is E. sp. by nf, and its brightest 
part is nearest the p. end ; also a in nf. edge. 787 is very curious. S 
A B. bright nucleus, which is eccentric, and a dark curved passage 
sp. the nucleus, as in sketch. The neby. outside this dark place runs 
up perhaps to the streak marked a, which is vF, but of its existence I have no doubt. 
