;[ 2i2 ] 
XX. Catalogue of a fecond Thou fund of new Nebula and Cla • 
Jier s of Stars ; with a few introductory Remarks on the Con - 
JlruEtion of the Heavens. By William Herfchel, L L. D* 
B. R. S • 
Read June ii, 1789. 
B Y the continuation of a review of the heavens with my 
twenty-feet refle&or, I am now furnifhed with a fecond 
thoufand of new Nebulae. 
Thefe curious obje&s, not only on account of their number, 
tut alfo in confideration of their great confequence, as being 
no lefs than whole fidereai fyftems, we may hope, will in future 
engage the attention of Aftronomers. Witt a view to induce 
them to undertake the neceflary obfervations, I offer them the 
following catalogue, which, like my former one, of which it 
is a continuation, contains a (hort defcription of each nebula or 
clufter of ftars, as well as its fituation with refpe<3: to fome 
known object. 
The form of this work, it will be feen, is exactly that of 
the former part, the claffes and numbers being continued, and 
the fame letters ufed to exprefs, in the fhorteft way, as many 
effential features of the objects as could poflibly be crowded into 
fo final! a compafs as that to which I thought it expedient to 
limit myfelf. 
The method I have taken of analyzmg the heavens, if I may 
fo exprefs myfelf, is perhaps the only one by which we can 
arrive 
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