in the relative Situation of double Stars, See. 
S75 
Motion of the three Bodies. 
(z ) Let the motion of the sun be again towards x Herculis ; 
then, if no motion in s Bootis be perceivable, it must move 
exactly like O. Highly improbable as it is, let it be admitted. 
Then, in addition to this extraordinary supposition, a third 
motion is also required for x , which, aided by the solar parallax, 
is to carry it likewise within a quarter of a diameter of e, into 
the same place where, though unperceived, the large star has 
been carried by its own motion ; that is, in order to be appa- 
rently at rest, the sun, e Bootis, and its small companion, must 
all move exactly alike, setting aside the very little difference in 
the position and distance of the small star, which, in the whole, 
amounts to little more than 6-tenths of a second ; than which, 
certainly nothing can be more improbable. 
But, if s shall hereafter be found not to have been at rest 
during the time of my observations upon it, then its place will 
be given ; and, since also the situation of x, with respect to s, is 
to be had from my angles of position and distances of the two 
stars, the case will be similar to that which has already been 
considered, in the paragraph (z ), under the head of y Leonis. 
I may here add a remark with regard to e Bootis, which will 
be applicable to several more of my double stars. In the milky- 
way, a multitude of small stars are profusely scattered, and 
their arrangement is very different from what we perceive in 
those parts of the heavens which are at a considerable distance 
from it. About e Bootis, which is situated in what I have for- 
merly called figuratively a t nebulous part of the heavens,* there 
are, comparatively speaking, hardly any stars ; and, that so 
* See Phil. Trans, for 1784, page 449, 
3 C 2 
