1118 PROCEEDINGS OF THE SOCIETY. 



unite the lower prisms by a wedge of glass. He also proposed an 

 alteration in the upper prisms (when they are used in place of a plate 

 of glass {supra, p. 959). 



Mr. Michael said he thought Mr. Ahrens' plan provided the one 

 thing wanting to perfect the Stephenson form of binocular, as the 

 prisms, as at present arranged with cork to separate them, not un- 

 frequently got displaced. 



Mr. T. B. Rosseter's paper on " The Uses and Construction of the 

 Gizzard of the Larva of Goreihra plumicornis " was read by Professor 

 Bell, and prepared specimens in illustration were exhibited under 

 Microscopes (supra, p. 991). 



Mr. Dowdeswell's paper on " The Cholera Comma Bacillus " was 

 read (supra, p. 953). 



Mr. Crisp stated that a communication had been received from the 

 American Society of Microscopists on the subject of the Society Screw- 

 gauge, which had been referred to a committee, and its consideration 

 had better, therefore, be adjourned until the committee had reported. 



The President called the attention of the meeting to the death of 

 Prof. Eobin, the eminent histologist, and one of the Honorary Fellows 

 of the Society. He might be termed the creator in France of histology, 

 for which a special chair was instituted. He had been Professor at 

 the Faculty of Medicine in 1832. In 1871 he worked with Littre in 

 founding the Society of Sociology " for the application of the positive 

 and scientific methods to the study of social doctrines." By his death 

 (in his 65th year) the French Senate had lost all but the last of its 

 scientific men. He was the author of the two well-known text-books, 

 ' Du Microscope et des Injections,' published in 1819, and the 

 ' Traite du Microscope,' the first edition of which was published in 

 1871, and the second in 1877, and contributed largely to the current 

 scientific publications. In conjunction with Littre, he recast the 

 ' Dictionnaire de Nysten,' and developed it into the now popular 

 ' Dictionnaire de Medecine,' published by Bailliere et Fils. 



The following Instruments, Objects, &c., were exhibited :— 



Mr. C. E. Ailing and Dr. Mandeville: — Slides illustrating Mr. 

 AUing's note. 



Mr. Badcock : — Oordylophora lacustris. 



Mr. C. Beck : — New form of Stephenson's Catadioptric Illuminator. 



Mr. Bolton : — AnurcBa stipitata. 



Mr. Cheshire : — Salivary glands and sac of Cockroach. 



Mr. Crisp:— (1) D'Arsonval's Water Microscope; (2) Eiddell's 

 Binocular Microscope; (3) " Twin " Single Microscope; (4) Beck's 

 slide boxes. 



Mr. Dowdeswell : — Slides illustrating his paper. 



Mr. Kitton : — New Diatom, Navicula Durrandii, n. sp. 



Mr. Eosseter : — Slides illustrating his paper. 



New Fellow :— Mr. Edward Y. "Weston was elected an Ordinary 

 Fellow. 



