121 



high powers. Certainly for his particular class of work he should naturally 

 object to abolish thin slips. 



The President said they were much obliged to Mr. Nelson for bringing 

 these subjects forward. As regarded the microscopic glass, he quite agreed 

 that it might be well to have a standard thin glass, but for ordinary work 

 he always used glass of about twice the thickness mentioned. He never 

 measured the slips, as he found his own fingers to be very good guides in 

 that respect ; but now that the oil immersion lenses were coming more into 

 use, he thought it might be well to try to get some uniform slip for use 

 with them. 



The President announced that Mr. Charlesworth had brought to the meet- 

 ing (through a mistake as to the night of meeting of the Geologists' Associa- 

 tion) a very interesting series of bones of the gorilla, which were displayed 

 on the table at the end of the room. Also that as the date of their next 

 ordinary meeting fell on Bank Holiday, December 26th, it had been deter- 

 mined to omit the meeting. Notice of this alteration would be given on 

 the Demonstration Cards about to be issued. 



The proceedings then terminated with the usual conversazione, and the 

 following objects were exhibited : — 



Lophojjus crystallinus Mr. F. W. Andrew. 



First leg of the Honey Bee showing comb j *^ F e uoc i- 

 f or cleaning antennas ... ... ... / 



Minute Hymenopteron from Ceylon to illus-^ 



trate Mr. Green's paper read April 27th> C Mr. T. Curties. 



18o3 .. ... ... ... ••• J 



Section of Oolite with Foraminifera Mr. W. M. Holmes. 



Lecythea Rosa, and Aregma mucronatum ... Mr. G. E. Mainland. 

 Larval compound ascidian, Leptoclinum -> -^ ^ ^ Michael 

 showing condition in the egg ... 5 



„ „ in the three anterior j 



suckers, &c. ... 3 



„ in structure of caudal , Dr> Matthews> 

 appendage ... 5 



Lima hians and nest made up of melabesia } 



7 . -, n , r , ni J Mr. S. H. Needham. 



calcaria and fragments or shell ... J 



Portion of nest of same, showing the lining | 



of byssus spun by the mollusc .. * " " " 



Attendance — Members, 68 ; Visitors, 3. 



December 12th, 188-4. — Conversational Meeting. 



The first demonstration of the third series, " On Bacteria and the methods 

 of staining them," was given this evening by Mr. E. Thurston, L.R.C.P., 

 Curator of the Anatomical Museum, King's College. 



The following is a resume of his lecture : — 



In the microscopical investigation of micro-organisms it is necessary for 

 most purposes, that they should be stained with anilin dyes, in order that 

 they may be rendered distinctly apparent. Nevertheless I strongly advo- 



