PROCEEDINGS OF THE SOCIETY. 909 



of attempting to correct the objective, we should correct the object by 

 mounting it always under conditions defined as those of homogeneous 

 immersion. 



Mr. Guimaraens called attention to a slide labelled " Pedicellariae 

 in situ, attached to the spine of Echinus gracilis" and sold as illus- 

 trating a discovery that pedicellariae are attached to the spines of 

 Echini. He would be glad to know whether the pedicellariae in 

 question were naturally attached to the spine, or whether an im- 

 position had been practised. 



Mr. Stewart said that in this specimen the pedicellariae were un- 

 doubtedly adherent ; but they could not have been so during the life 

 of the animal. 



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



Mr. Beck : — (1) Slide of Bacillus tuberculosis prepared by Dr. 

 H. Gibbes. (2) New Lithological Microscope. 



Mr. E. W. Burgess : —Diatoms from the Island of Lewis. 



Mr. Crisp : — (1) Gundlach's College Microscope. (2) Boecker's 

 Air-pump Microscope. (3) The Bausch and Lomb Optical Co.'s 

 Immersion Illuminator. (4) Thomas's Vivarium. (5) New Achro- 

 matic Spherical Pocket-lens by Gundlach ( " Globe lens " ). 



Mr. Guimaraens : — Slide labelled " Pedicellariae in situ attached 

 to spine of Echinus gracilis." 



Mr. Ingpen : — (1) Nelson's Nose-piece Adapter. (2) Objective of 

 Andrew Ross with tapering front. 



Drs. Loew and Bokorny : — Twelve slides illustrating their views 

 on the chemical difference between dead and living protoplasm. 



Dr. Ondaatje : — Specimens of Echinoderms, Gorgonidae, Algae, &c. 



Meeting of 8th November, 1882, at King's College, Steand,W.C, 

 The President (Professor P. Martin Duncan, F.R.S.) in the 

 Chair. 



The Minutes of the meeting of 11th October last were read and 

 confirmed, and were signed by the President. 



The List of Donations (exclusive of exchanges and reprints) 



received since the last meeting was submitted, and the thanks of the 



Society given to the donors. 



From 



Braithwaite, E. — The British Moss Flora. Part 6 .. .. The Author. 



Deby, J., and Kitton, F. — A Bibliography of the Microscope 

 and Micrographic Studies, being a Catalogue of Books 

 and Papers in the Library of J. Deby. Part 3. The Diato- 

 macea3 Mr. Deby. 



Saurel, L. — Du Microscope au point de vue de ses applica- 

 tions a la connaissauce et au traitement des Maladies 

 Chirurgicales. 148 pp. (8vo. Paris, 1857) Mr. Crisp. 



Six slides of ovaries, &c, of plants Mr. Krutschnitt. 



Five slides of Diatoms mounted from the materials sent by 



Mr. W. F. Petterd from Tasmania Mr. Kitton. 



Ser. 2.— Vol. II. 3 P 



