Miscellaneous Intelligence. - 143 
and breadth of angular aperture, in his higher powers are well known 
and have been long since acknowledged—even by his European com- 
petitors. In the New York Crystal Palace Exhibition the first prize for 
Microscopes was awarded to Mr. Spencer, the second to Messrs. Gru- 
now. Since that time the latter makers have steadily advanced in the 
excellence of all parts of their instruments. Their form of stand for 
steadiness, ease of management, simplicity and economy is unrivalled 
and the moveable stage with universal motion in on 
all respects. One of the most experienced microscopists in the United 
u ha 
_ familiar with for some time. It is a source of otic that our 
_ Students of medicine can now obiain the means of pursuing microscopic 
experienced in importing European instrume 
. J. L. Smith, is built only 
le of workmanship. They also pro- 
duce very perfect geo lesic and surveying instruments, and are pre- 
_ pared to undertake any instrument of research or illustration require 
. 10 refined physics or chemistry. We take pleasure in calling the alten- 
‘Hon.of scientific men generally to the establishment of Messrs. Gru- 
Ww, as adding a new and valuable resource to their means. 
We have recently received a circular, from Wm. Burruum & Son, 
makers of Microscopes and Telescopes at Milburne, Lake Co., Illinois. 
3. Melloni.—An oversight occurs in M. Nicklés’s obituary notice of 
the distinguished physicist, Melloni. He states that Melloni’s “* treatise, 
entitled, La Thermochrosie, was found among his papers, and published 
tions ; by Sir Joun F. W. Herscuet, (Proc. Astronom. Soc. in Athen., 
No. 1435.)—I consider it an object of very considerble importance to 
Secure at some observatory, and indeed at more than one, 10 different 
localites, daily photographic representations of the sun, oe view to 
e 
object-lens, but in that of the eye-lens, drawn out somewhat beyond the 
a 
