PROCEEDINGS OF THE SOCIETY. 399' 



Mr. C. F. Rousselet said that the Society were going to exhibit in 

 the Biological Section of the Franco-British Exhibition a collection of 

 instruments illustrative of the history of the Microscope. The collec- 

 tion would consist of twenty-eight old Microscopes, most of which were 

 taken from the Society's own collection, several others being lent for 

 the purpose by Sir Frank Crisp and Mr. Nelson. As the Fellows 

 present would no doubt be interested in what would be shown, lantern 

 slides of the various instruments had been prepared, which were then 

 exhibited on the screen — a brief description being given of each, and 

 the parts referred to being indicated where necessary by Mr. J. W. 

 Gordon with a pointer. The series included models by Leeuwenhoek, 

 Wilson (screw barrel form), Lieberkuhn, Marshall, Culpeper, Jones, 

 Benjamin Martin, Shuttleworth, Cuthbert, Chevalier, Hugh Powell 

 (early form 1839), James Smith, Andrew Ross ; and finished with 

 Powell and Lealand's of 1848. 



The Chairman felt sure that the Fellows of the Society had been 

 greatly interested by this exhibition, and would return a very hearty 

 vote of thanks to Mr. Rousselet and Mr. Gordon for bringing the matter 

 before them. The thanks of the Society were unanimously voted to 

 these gentlemen accordingly. 



Mr. J. E. Barnard exhibited an old Photomicrographic Apparatus, 

 which was designed by Dr. Maddox for Dr. Lionel S. Beale. There 

 were two points about it which were worth notice ; the first of which 

 was, that the objective was connected up to the stage by a light-excluding 

 appliance ; the other being that the sub-stage condenser, and other 

 illuminating apparatus, were carried on a triangular bar, which was 

 inverted. He should be very pleased to place the apparatus at the 

 disposal of the Society if it was considered of sufficient value to be worth 

 adding to their collection. 



The Chairman expressed the thanks of the Society to Mr. Barnard 

 for his exhibit, and for the present to them of the apparatus described, 

 which they would be very pleased to accept and to place amongst the 

 other objects of interest in their collection. 



The Chairman called attention to the large number of examples of 

 pond-life exhibited in the room, and asked for a very hearty vote of" 

 thanks to those Members of the Quekett Club and Fellows of their own 

 Society who had brought their Microscopes and objects for exhibition. 



The following Instruments, Objects, etc., were exhibited : — 



The Society : — Lantern Slides of Microscopes to be exhibited at the 



Franco-British Exhibition. 

 Mr. J. E. Barnard : — An Old Photomicrographic Apparatus. 

 Specimens of Ponddife, as follows : — 



Mr. F. W. Watson Baker: — Plumatella emerging from statoblasts. 

 Mr. James Burton : — Draparnahlia sp., Stentor sp. Illuminated with 



Rheinberg's colour disks. 

 Mr. Thomas N. Cox : — Anacharis. 

 Mr. D. Davies : — CEcistes crystallinus. 



