of ascertaining the Magnitude of small celestial Bodies. 37 
globules, No. 1 of silver, diameter ,01137 ; No. 2 of sealing- 
wax ,01125; No. 3 of pitch ,00653. 
With 522,7 I saw No. 1 round, and could estimate ~ of its 
diameter. The angle is o",q8 9 ; \ of it is 0^,247 . 
I saw No. 2 round, but of a dusky-red colour. It is not 
nearly so bright as No. 1 ; nor does it appear quite so large 
as the proportional measure of the globules would require. I 
can estimate •§• of its diameter. The angle is o",979 ; and j- of 
it is o",326. 
No 3 reflects so little light that I can barely perceive the 
globule, but not its form ; and yet it subtends an angle of 
o ",568. 
To discover whether this ought to be ascribed intirely to the 
want of reflection of the pitch, I took up some white melted 
bee’s-wax, by dipping the fine point of a needle perpendicu- 
larly into it. This happened to be only half a globule, and its 
diameter was ,0105. 
When I examined the object with 523 I saw it with great 
ease, and could estimate ~ of its diameter. The angle is o",9 14 ; 
and of it is o'', 2 28. I saw also that it was but half a globule. 
I took up another, that I might have a round one ; but found 
that again I had only half a globule. It was so perfectly bi- 
sected, that art and care united could not have done it better. 
Its diameter was ,0108. In the telescope I saw its semiglobular 
form, and could estimate ~ of its diameter. 
By some further trials it appeared, that a perfect globule of 
this substance could not be taken up, the reason of which it is 
not difficult to perceive : for as it melts with very little heat, 
it will cool the moment the needle is lifted up ; and the surface, 
which cools first, will be flat. 
