448 Mr. HERscue1’s Od/ervations on 
the’ branching out of a fecondary ftratum, it will very natu 
rally lead us to guefs at the caufe of the probable motion of 
the folar fyftem: for the very bright, great node of the Via 
Latis, or union ‘of the two {trata about Cepheus and Caf iopeia, 
and the Scorpion and Sagittarius, points out a conflux of ftars 
manifettly quite fufficient to occafion a tendency towards that 
node in any ftar fituated at no very great diftance; and ‘the 
fecondary branch of the Galaxy not being much lefs than a 
f{emi-circle feems to indicate fuch a fituation of -our folar fyftem 
in the great undivided ftratum as the-moft probable. 
What has been faid in a former paper on the fubjeCt of the 
folar motion feems alfo to fupport ‘this fuppofed fituation’ of 
the fun’; for the apex’there affigned lies nearly in the dire€tion 
of a motion of the fun towards the node'of the ftrata. Be- 
fides, the joining ftratum making a pretty large angle at the 
junction with the primary one, it may eafily be admitted, that 
the motion of a ftar in the great ftratum, efpecially if fituated 
confiderably towards the fide fartheft from the fmall ftratum, 
will be turned fufficiently out of the ftraight direétion of the 
great ftratum towards the fecondary one. But I find myfelf 
infenfibly led to fay more on this fubject than I am as yet au- 
thorifed to do; I will, therefore, return to thofe obfervations 
which have fuggefted the idea of celeftial f{trata. 
In my late obfervations on nebule I foon found, that I ges 
nerally detected them in-certain directions rather than in others; 
that the {paces preceding them were generally quite deprived of 
their ftars, fo as often to afford many fields without a fingle 
itar in it. that the nebule generally appeared fome time after 
among. ftars of a certain .confiderable fize, and but feldom 
among very {mall ftars; that when I.came to one nebula, I 
generally found feveral more inthe neighbourhood; that after- 
wards 
