with Remarks on the Construction of its different Parts. 117 
only such as will spuriously arise from every small star-like 
appearance; and this was fully confirmed when I examined it 
with 240 ; for by this its magnitude was not increased ; which 
not only proved that my power was not sufficient'to. reach the 
real diameter of the object, but that the light of this point was, 
like that of small stars, sufficiently intense to bear being much 
magnified. 
I viewed it next with 300, and here again I could perceive 
no increase of size. 
When I examined the point with 400, it appeared to me 
somewhat larger than with 300 ; I saw it indeed rather better 
than with a lower power, and had reason to believe that its 
real diameter was now within reach of my magnifiers. Curio- 
sity induced me to view it in the 7 feet telescope with a power 
of 460 ; and notwithstanding the inferior quantity of light of 
this instrument, the magnitude was fully sufficient to show 
that the increase of size in this telescope agreed with that in 
the 10 feet. 
Returning again to the latter I examined the bright point 
with 6 00, and saw it now so much better than with 400, that 
I could keep it steadily in sight while it passed the field of view 
of the eye-glass. 
With this power I compared its appearance to the size of 
several globules, that have been examined with the same tele- 
scope and magnifier, and by estimation I judged it to be visibly 
smaller than one of i",o 6 in diameter, and rather larger than 
another of o",68. 
It should be noticed that I viewed the globules, which were 
of sealing wax, without sunshine, in the morning after the 
observation as well as the morning before ; referring in one 
