PROCEEDINGS OF THE SOCIETY. 
241 
Mr. Karop inquired if it was made so that the object could be com- 
pressed without removing the ebonite ends ? 
Mr. Beck said that the central portion of the ebonite was cut away 
so as to give room for the fingers to work the conipressorium quite freely 
whilst on the stage of the Microscope. 
The President said, from what he had seen of this corapressoriura, it 
appeared to be a very valuable piece of new apparatus which was likely 
to be much appreciated. 
The thanks of the Society were voted to Mr. Beck for his exhibit. 
Mr. Watson Baker exhibited one of Messrs. Watson and Sons’ Van 
Heurck pattern Microscopes made so as to give a complete rotation to 
the stage. In other respects it was the same as the usual pattern. He 
also showed a new cover-glass clip devised by Mr. Pakes, of Guy’s 
Hospital, for making blood-films for examination in cases of disease (see 
p. 227). 
The President thought the alteration in the stage of this Microscope 
was a step in the right direction. Hr. Ballinger, when President of the 
Society, spoke of the great desirability of making the stage so that it 
could be completely rotated, and he believed this was also insisted upon 
by another President, Mr. Michael. 
The Secretary said he had not seen the cover-glass clip before, and 
thought it likely to be of use, more especially as the technique of the 
blood was coming more and more into notice. 
The thanks of the Society were voted to Mr. Watson Baker for these 
exhibits. 
The President called attention to the Martin Microscope which was 
given to the Society last year, but which he had not then time carefully 
to examine. Since then he had done so, and came to the conclusion 
that, although it was undoubtedly evolved from Benjamin Martin’s 
Microscope which was described in 1765, it certainly was not one of 
the original make. He thought it was a very good modern imitation of 
Martin’s Microscope, made probably about 1850. It agreed with the 
drawing (see p. 213). 
The President said ho had received a letter from Mr. Keeley, of 
Philadelphia, which he read to the Meeting (see p. 188). 
Mr. Keeley had sent, in addition to the photographs which had been 
handed round, a slide containing sections of these diatoms mounted on 
edge. This he had examined, and he was able to corroborate all that 
Mr. Keeley had said. With regard to the Coscinodiscus and the Tri- 
ceratium, Mr. Morland was, he believed, the first to work out and 
correctly describe these structures ; his results were published by him 
(the President), together with a photo print, in the Transactions of the 
now defunct Middlesex Natural History Society (Jan. 1889). Mr. 
Keeley’s present observations quite confirmed these results. So far as 
he was aware, the account they had heard that night of the structures of 
Heliopelta and Auliscus was original. He was sure they would all give a 
hearty vote of thanks to Mr. Keeley for his interesting communications. 
