432 
PROCEEDINGS OF THE SOCIETY. 
sphere of experiment. Dr. Flogel’s sections of diatoms made with his 
unique microtome dealt with the same point by direct experiment, but 
unfortunately the production of such sections was attended by very great 
difficulties, and their preservation for inspection by other observers was 
apparently so uncertain as to be unreliable, judging from the specimens 
sent by Dr. Flogel to the Society. Hr. Mayall regretted that Mr. Gill’s 
photographs of the specimens he described were so faint that it would 
be very difficult to utilize them for any photomechanical process of 
printing for the Journal. 
Mr. Mayall said that in Part IT. Yol. I. of the Journal of the 
Liverpool Microscopical Society there was a paper by Mr. T. Comber, 
in which he dealt very practically with the processes of photomicro- 
graphy with sunlight. He was, of course, sorry that this paper did not 
come directly to the Eoyal Microscopical Society : but considering the 
interest which attached to the subject, and the references made recently 
to Mr. Comber’s work, the paper would probably be dealt with rather 
extensively in the next number of the Journal. 
The President asked the Fellows present to bear in mind that the 
Conversazione was fixed for Thursday, the 30th of April, at which he 
hoped to see a good attendance, and that the next ordinary meeting 
would take place on the 20th of May. 
The following Instruments, Objects. &c.. were exhibited 
Mr. C. H. Gill : — Six photographs of Diatom Structures in illustra- 
tion of his paper. 
Mr. E. M. Nelson: — Bull’s-eye Condensers and Photographs of 
Diatoms in illustration of his papers. 
Mr. C. F. Eousselet : — A sKde of Stejphanoceros Eichornii. 
Mr. T. Charters White : — Three preparations permeated with 
coloured collodion. 
New Fellow: — The following was elected an Ordinary Fellow : — 
Mr. Wilmot Tunstall. 
Meeting of 20th Mat, 1891, at 20, Hanover Square, W., 
the President (Dr. E. Braithwaite, F.L.S.) in the Chair. 
The Minutes of the meeting of 18th February last were read and 
confirmed, and were signed by the President. 
The List of Donations (exclusive of exchanges and reprints) 
received since the last meeting was submitted, and the thanks of the 
Society given to the donors. 
From 
Kolliker, A., Handbuch der Gewebelelire des Menschen . . . 
Dritte Auflage. pp. xxiv. and 686, text illust. (Svo, 
Leipzig, 1859) 
Slides (3) of Cysticercus 
Prof. F. Jefrey Bell. 
Mr. T. B. Basse ter. 
