REPORTS FROM THE SECTIONS. 175 
_ Notes on some recent Objectives manufactured by 
Carl Jeiss, of Jena. 
By G. D. Hirst. 
. [Read before the Microscopical Section, 9 June, 1879.] 
islikely that there are few present who are not acquainted 
Zeiss's objectives ; they have frequently been exhibited at 
’ s, when their fine definition and great reso 
‘Power on different tests has been much admired. Several of us 
have Specimens from jin. and higher in our possess 
and have proved how eminently fitted are they, no less for the 
1 requirements of the microscopist than for work on obsti- 
It is not, therefore, to enlarge upon the general excellence of 
Zeiss Swork that I have ventured to ask your attention for a 
sty of examining one of Zeiss’s latest G immersions, an 
was suggested by Mr. J. W. Stephenson to Professor 
of 
number on the scale on making the correction again 
to the collar. If this be the case with a known 
