56 PROCEEDINGS OF SOCIETIES. Kumll.SyTff 
veries made by the aid of the microscope from the time of Leenwenhoek 
to the present period. 
Selenite Plates for the Microscope. — Some very excellent and 
remarkably cheap selenite plates were recently shown us by Mr. W. 
Bestall (4, Warrior Eoad, Camberwell New Eoad, S.E.), who prepares 
also a very simple and inexpensive form of polariscope, which those 
interested in polariscopy would do well to examine for themselves. 
PKOCEEDINGS OF SOCIETIES * 
EoYAL Microscopical SociETY.t 
King's College, June 9, 1869, 
The President (Eev. J. B. Eeade, M.A., F.E.S.), in the chair. 
The minutes of the last meeting were read and confirmed. 
A list of donations to the Society was then read; and Mr. Jabea 
Hogg asked the Society to accept a new edition of his work on the 
Microscope. 
Mr. Hogg announced that he had received from the widow of the 
late Dr. W. B. Herapath, of Bristol, the inventor of the Herapathite, 
a number of specimens of that crystal, which would be found very 
useful for polarizing ; and that any Fellow of the Society who 
might wish to possess one, could obtain it of the Assistant-Secretary 
(Mr. Eeeves), at a cost of about two shillings. 
The President having intimated that Dr. Eulenstein had a matter 
of business to bring before the meeting. 
Dr. Eulenstein said it was probably well known that the late 
Dr. Arnott possessed one of the most complete collections of Diatoms 
in existence. That collection was about to be sold, and he had 
arranged to purchase it. A full and particular list had been made of 
the collection, and any gentleman who wished to obtain specimens 
would be supplied with a catalogue on application, and the slides 
selected would be delivered during the current summer. 
The President said it would be very desirable for the Society to 
possess such a collection as that to which Dr. Eulenstein had referred ; 
and he presumed that if the Council undertook the responsibility of 
j3urchasing sets, the Fellows would be willing to indemnify them for 
the same. 
He also thought it advisable to make some reference to a series of 
papers on " The Construction of Object-glasses for the Microscope," 
of which Mr. F. H. Wenham was the author. These papers had 
appeared in the Journal ostensibly as communications addressed to 
the editor. They had, however, been published in that form as a 
* Secretaries of Societies will greatly oblige us by writing out their reports 
legibly — especially the technical terms — and by "underlining" words, such as 
specific names, which must be printed in italics. They will thus ensure accuracy 
and enhance the value of their proceedings. — Ed. M. M. J. 
t Report supplied by the Secretaries. 
