PROCEEDINGS OF SOCIETIES. 
157 
to me to be a very simple one, and easily decided. I will undertake 
to produce a series of objects that can be well shown with the small- 
aperture glasses, upon which the higher ones will completely fail 
(even the 180°); these must be left for dots and striae on the flat and 
most excruciating tests. 
I need not look to, or care for the maker's name, as this has nothing 
to do with the question, provided the glasses are well made and corrected, 
as so many of them are by different makers : thus all jealousies may 
be avoided. Mr. Slack's views concerning the use and value of 
apertures considerably less than 180° for general observation, are so 
obvious, and have been endorsed by eminent microscopists who have 
really made all the most important investigations, that I am surprised 
at the opposition which, however, is evidently biassed by trade 
feelings. 
As yet English makers need have no anxiety on the score of 
superiority ; they will not be found behind either Continental or 
American in the most recent improvements. 
I am. Sir, yours very truly, 
F. H. Wenham. 
PEOCEEDINaS OF SOCIETIES. 
QuEKETT Microscopical Club. 
Ordinary Meeting, June 25.— Dr. Matthews, F.R.M.S., President, 
in the chair. 
Nominations were made of candidates to fill the offices of Presi- 
dent, Vice-Presidents, Secretaries, and vacancies on the Committee. 
Dr. Matthews was proposed as President for the ensuing year. 
The Secretary explained the method of using the scale for the 
measurement of angular aperture devised by Mr. J. W. Stephenson, 
who had kindly presented to the club a number of copies for the use 
of the members. 
The Secretary described two lamps which had been patented by 
Mr. Parkes, of Birmingham. One had a circular and the other a flat 
wick, and in each case the light was placed in the focus of a parabolic 
reflector, throwing a beam of approximately parallel rays. There was 
also a tinted glass in the front of each reflector to correct the yellow- 
ness of the flame. 
Mr. B. T. Lowne gave a continuation of his lecture on the His- 
tology of the Eye, treating principally of the minute structure and 
functions of the retina, and giving the latest and most approved 
methods of hardening, cutting, and mounting sections of it for micro- 
scopical examination. 
