Astronomical Society. 381 
double star; but the inconvenience is so slight, that without 
critical attention, its existence would not be suspected. It is 
no way offensive, and can certainly not be called a serious de- 
fect, and might arise from imperfect adjustment. In every 
other respect the definition of this star, with the power men- 
tioned, was excellent. 
w* Leonis is one of the most difficult double stars in the 
heavens. With 220 it was seen elongated ; with 700 it was 
distinctly seen to consist of two discs in apparent contact. 
With this high power, a slight degree of diffusion in the light 
of the stars was perceptible, but on the whole the performance 
of the telescope was extremely good. 
¢ Cancri was examined with 300, 450, and 700. With 
the lowest power it was seen triple, very beautifully defined, 
and the close stars distinctly separated. With 450 they were 
well separated, and the black interval distinctly seen. With 
700 the separation remained perfectly distinct. 
A minute star was suspected near a? Cancri; but on com- 
paring the diagrams made of it with its real position, it could 
not have been the true companion of that very difficult double 
star, which to be perceived requires the full power of reflectors 
of the largest class. 
The companion of Polaris was of course perfectly well seen. 
The light of this telescope is, however, amply sufficient for 
showing the nebulze of Sir W. Herschel’s Ist class. Several 
of these were examined, and the high degree of concentration 
of the rays in the focus arising from the absence of aberration 
proved very valuable, and was evidently marked in the re- 
solvable appearance exhibited by them. 
Saturn was shown with great distinctness, the division of 
the ring, and the three interior of the old five satellites being 
plainly seen. A satellite on the body of Jupiter was also seen 
as well as its shadow; and the planetary discs of the other sa- 
tellites could not be mistaken for spurious ones. 
Your Committee consider that the facts above detailed, 
speak sufficiently for themselves, as to the excellence of the 
telescope, to render comments or praise on their part, super- 
fluous ; but they cannot close this report without observing 
once more on the great pains bestowed on its workmanship 
by Mr. Tulley, and his address in availing himself of the re- 
sources of his art in operating on a material which might cer- 
tainly in the beginning be regarded as highly unpromising. 
(Signed) G. Doxtonp. 
J. F. W. Herscuen. 
Ww. PEarson. 
Report 
