PROCEEDINGS OF THE SOCIETY. 
771 
to him that one answer at least to the question was found in the fact 
that, if it were not for the existence of a large body of persons who were 
interested in “ methods/' histologists would not bo able to do as much 
in the way of investigation as they now found to be possible. They 
were very much obliged to Dr. Turner for coming to the meeting that 
evening, and showing them not only what the results of these processes 
were, but how they bore on those physiological problems which presented 
themselves for solution. They might rest assured that those who went 
on improving their methods would continue to be materially assisting 
the physiologists in their investigations. 
The President, in proposing a hearty vote of thanks to Dr. Turner 
for his very interesting demonstration, expressed the pleasure which it 
had given to those present to be made acquainted with the results 
attained by these staining processes, and especially by Golgi’s method, 
which was one of the most valuable of all. He was himself much 
surprised to hear that English physiologists had only made use of it 
so recently, because it was certainly a process which gave them a 
knowledge of structure which was in the highest degree useful and 
valuable. 
Mr. E. M. Nelson, who was warmly congratulated by the President 
upon his reappearance amongst the Fellows of the Society after his recent 
serious illness, explained, by means of blackboard diagrams, a simple 
method of measuring the refractive indices of media. 
He also described a new modification of the reflecting camera lucida, 
by means of which the advantages of Dr. Beale’s neutral tint reflector 
were secured, without its corresponding disadvantage of lateral inver- 
sion. 
He also called attention to a very interesting little portable Micro- 
scope by Zentmayer, in the possession of Mr. Bousselet, and to a slide 
of karyokinesis of the lily, sent to him by Dr. Marriot of Salisbury, 
shown under a Microscope in the room. 
The President was sure that anything which simplified or facilitated 
the use of a simple camera lucida was sure to be welcomed by those who 
were in the habit of making microscopical drawings. Personally, he was 
inclined to prefer to make drawings by using a piece of glass, ruled in 
squares, and drawing what he saw through this upon paper similarly 
ruled in squares ; but where it was desired to draw objects rapidly, the 
possession of a simple camera lucida which did not require the head to 
be kept absolutely steady was a great advantage ; and if the lateral 
inversion of the image could be got rid of and the object could be drawn 
as it appeared upon the stage, a very useful end had been attained. 
Anything in this direction which facilitated the process of delineating 
objects under the Microscope could not fail to be extremely useful. 
The following Instruments, Objects, &c., were exhibited:— 
The Society : — Mr. A. W. Cooper’s Slides. 
Dr. Measures : — A new Stage by Messrs. Zeiss. 
Mr. E. M. Nelson : — A new Camera Lucida ; Zentmayer’s Portable 
Microscope ; Slide showing Karyokinesis of Lily ; Photomicrographs. 
