TRANSACTIONS 
OF THE 
MICROSCOPICAL SOCIETY 
OF 
LONDON. 
Some Remarks on obtaining Photographs of Microscopic 
Objects, and on the Coincidence of the Chemical and 
Visual Foci of the Object Glasses. By F. H. Wenham. 
(Read November 22nd, 1854.) 
In this communication it is not my intention to give a detailed 
description of the well-known methods of obtaining micro- 
photographs, which have already been explained in the papers 
of Messrs. Delves, Shadbolt, and others, but merely to point 
out a remedy for some of the difficulties that have hitherto 
been connected with the process. 
The main points in this paper were read at the last meeting 
of the British Association for the Advancement of Science, at 
Liverpool, but I have thought it proper to bring them forward 
again, as I believe that the principal number of those who 
have entered into the practice of this department of photo- 
graphy are members of the Microscopical Society. 
As it is now upwards of two years since the announcement 
was first made, and from the few specimens that have been 
produced since that period (many of which are in the hands 
of our Society), it may fairly be assumed that the practice of 
microscopic photography has not become by any means uni- 
versal, and, in fact, there are some amongst us who doubt 
whether the art can ever be usefully applied, or prove a sub- 
stitute for the camera lucida. I should regret to see this 
application of the microscope abandoned, while it is still 
under the march of improvement, and while science can 
furnish us with new facts to facilitate the process. The con- 
clusion that I have arrived at, derived from my own practice, 
is, that it is in general both easy with respect to manipulation, 
rapid in production, and faithful in delineation, and I have a 
favourable opinion of its utility. There are some exceptional 
cases, which I shall notice. How far the specimens that I 
herewith present to the Society will bear me out in this assur- 
VOL. III. b 
