12 SIR J. F. W. HERSCHEL’S CATALOGUE 
ee. excessively, 
er. easily resolvable, 
exc. excentric. 
E. extended. 
f. following. 
F. faint. 
g. gradually, 
gr. group. 
H. Sir William Herschel. 
h. Sir John Herscbel. 
b.o.n. list of omitted nebulae in C.G.H. 
i. irregular, 
inv. involved. 
involving. 
iF. irregular figure. 
I. little (adv.). 
long (adj.). 
L. Large. 
Lac. Lacaille. 
Lai. Lalande. 
Lass. Lassell. 
m. much. 
mm. mixed magnitudes. 
mn. milky nebulosity, 
mon. monograph. 
M. Middle, or in the middle. 
M. (in col. 3) Messier. 
Mess. Messier. 
n. north, 
neb. nebula. 
np. north preceding, 
nf. north following, 
nr. near. 
N. nucleus, or to a nucleus. 
o. omitted. 
ON". omitted nebula. 
p. preceding. 
p. pretty (before F, B, L, S, &c.). 
pg. pretty gradually, 
pm. pretty much, 
ps. pretty suddenly. 
P. poor. 
Pi. Piazzi. 
P.T. Philosophical Transactions, 
quad. quadrilateral, 
quar. quartile. 
r. resolvable, barely (mottled as if with stars). 
rr. 
partially resolved — some stars visible. 
rrr. 
well resolved — clearly seen to consist of stars. 
R. 
round. 
RR. 
exactly round. 
R. nova. 
New nebula discovered by Lord Rosse. 
R. MS. 
Manuscript notes furnished by His Lordship. 
Ri. 
Rich. 
R. 
The Earl of Rosse. 
s. 
suddenly. 
s. 
south. 
sp. 
south preceding. 
sf. 
south following. 
sc. 
scattered. 
st. 
stars. 
sev. 
several 
susp. 
suspected. 
sh. 
shaped. 
stell. 
stellar. 
S. 
small. 
sm. 
smaller. 
sw. 
sweep. 
2 . 
Struve. 
tri-N. 
tri-nuclear. 
trap. 
trapezium. 
V. 
very. 
w. 
an intensive of v. 
var. 
variable. 
W. H. 
Sir W. Herschel. 
Besides these abbreviations of words, the following 
arbitrary signs are used. 
* a star; *10 a star of the 10th magnitude. 
** a double star ; J* a triple star. 
! a remarkable object ; ! ! very much so ; ! ! ! a magni- 
ficent or otherwise exceedingly interesting object. 
? doubtful; ?? very doubtful, either as to accuracy of 
place or reality of existence, according to the column in 
which it occurs. 
: , : : , see explanations already given. 
A a triangle. Forms a triangle with. 
© a globular cluster of stars. 
O a planetary nebula. 
® an annular nebula. 
st. 9 Stars from the ninth (or other) magnitude 
downwards. 
st. 9 .... 13 Stars from the ninth down to the 13th 
magnitude. 
As examples of the interpretation and expansion of these abbreviations some examples 
are subjoined. 
