254 Mr. Herschel on the 
intermediate parts are filled up by {mailer flars arranged in 
draight lines between the gaged ones. The delineating points, 
though pretty numerous, are not fo dole as we might wifh ; 
it is however to be hoped that in lome future time this 
branch of afrronomy will become more cultivated, fo that we 
may have gages for every quarter of a degree of the heavens at 
lead:, and thefe often repeated in the mod favourable circum- 
ftances. And whenever that {hall be the cafe, the delineations 
may then be repeated with all the accuracy that long experience 
may enable us to introduce; for, this fubjefl being fo new, I 
look upon what is here given partly as only an example to 
illudrate the fpirit of the method. From this figure how- 
ever, which I hope is not a very inaccurate one, we may fee 
that our nebula, as we obferved before, is of the third form ; 
that is : A very extenjive , branching , compound Congeries of 
many millions of fars ; which mod: probably owes its origin to 
many remarkably large as well as pretty clofely {battered fmall 
ftars, that may have drawn together the red:. Now, to have 
fome idea of the wonderful extent of this fydem, I mud ob- 
ferve that this fe&ion of it is drawn upon a fcaie where the 
didance of Sirius is no more than the Both part of an inch ; fo 
'that probably all the dars, which in the fined nights we are 
able to didinguifh with the naked eye, may be comprehended 
within a fphere, drawn round the large dar near the middle, 
rep relenting our fituation in the nebula, of lefs than half a 
quarter of an inch radius. 
The Origin of nebulous Strata . 
If it were poffibfe to didinguifh between the parts of an 
indefinitely extended whole, the nebula we inhabit might be 
faid 
