PROCEEDINGS OF SOCIETIES. 
91 
Powell and Lealand — and (2) the broad gauge adopted by Ross and 
the other London opticians, although the discrepancy between the two 
is such that an object-glass having the latter does not fit any micro- 
scope having the former, unless the “ universal screw ” of either the 
microscope or of the object-glass has been considerably eased. It is 
perfectly evident that one or other of these gauges is not correct. If 
the word universal is to be taken literally, the broad gauge seems to 
be the correct one, as the object-glasses of Beck, and Powell and 
Lealand, fit Ross’s microscopes, while the object-glasses of Eoss do not 
fit the microscopes of the former unless the screws have been eased 
“ to order ” ! On the other side I have heard repeatedly the assertion 
that the narrow gauge is the correct one. Could not the Society 
settle the discrepancy for the sake of completing the great boon they 
have conferred upon microscopists in introducing the “ universal 
screw ” ? 
Continental opticians seem to have, in many instances, a really 
“ universal screw ” for their object-glasses. I have lately received, 
from Paris, one of Hartnack’s No. 7, and from Berlin, one of Beneche’s 
No. 7 — both these object-glasses have precisely the same gauge of screw — 
the adapter made for one fitting exactly the other. 
Your obedient servant, 
A. de Souza Guimaraens. 
PROCEEDINGS OF SOCIETIES. 
Royal Microscopical Society. 
King’s College, January 6 , 1875 . 
Charles Brooke, Esq., F.R.S., President, in the chair. 
The minutes of the preceding meeting were read and confirmed. 
A list "of donations to the Society was read by the Secretary, and 
the thanks of the meeting were voted to the donors. 
The President reminded the Fellows that the ensuing meeting in 
February would be their anniversary, and that it would devolve up on 
them then to elect Officers and Council for the year following. In 
accordance with their usual custom a “ house list” had been prepared 
of the names of those gentlemen who were nominated by the Council, 
and he called upon the Secretary to read it to the meeting. 
The Secretary read the following list of nominations : 
As President — H. C. Sorby, Esq., F.R.S., &c. 
As Vice-Presidents — Dr. Braithwaite, Dr .Millar, Mr. C. Brooke, 
and Dr. Carpenter. 
As Treasurer — Mr. J. W. Stephenson. 
As Hon. Secretaries— Mr. H. J. Slack and Mr. Chas. Stewart. 
As Council — Mr. F. H. Wenham, Mr. Frank Crisp, Mr. F. H. Ward, 
VOL. XIII. H 
