4,6 Dr. Hersciiel’s Experiments on the Means 
of the globules are also in this respect like the spurious disks 
of the stars ; for they are proportionally lessened by increasing 
the magnifying power, and increased when the power is 
lowered. '-< > 
(3.) When the estimations are compared with the powers, 
it will also be seen that the increase and. decrease of the spurious 
disks of the globules is not inversely as the powers, but in a 
much less ratio. 
11th Experiment. 
Two other globules of different sizes were examined; and 
With 706,3 they were pretty unequal. 
With 322,7 they were considerably unequal. 
With 303,8 they were very unequal. 
( 6. ) This proves that the effect of magnifying power is 
unequally exerted on spurious diameters ; and that, as with 
celestial objects, so with terrestrial, this power acts more on 
the small spurious disks than on the large ones. 
12 th Experiment. 
I viewed a different artificial double star with 322,7, and 
keeping always the same power, changed the aperture of the 
telescope. 
With the inside rays I found them considerably unequal, and 
2-§- diameters of the largest asunder. The spurious disks are 
perfectly well defined, round, and of a planetary aspect. 
With all the mirror open, they are also round and well 
defined. 
With the outside rays, they are near 4 diameters of the largest 
asunder, and are also round and distinct, but surrounded with 
flashing rays and bright nodules in continual motion, 
