( 682 ) 
PROCEEDINGS OF THE SOCIETY. 
The first Conversazione of the Session was held at King’s College on 
Wednesday, the 27th November, 1889. 
The following objects, &c., were exhibited: — 
Mr. ( '. D. Ahrens : — Polarizing Binocular Microscope. 
Mr. H. P. Aylward: — Patent Spring Clip for securing the covers of 
jars, &c. 
Educational Series of Botanical Preparations. 
Rev. G. Bailey : — Section of Coniferous Wood from Flint, Lewisham. 
Mr. C. Baker: — Samoan Deposit under Zeiss’ Apochromatic 1/2 in. 
N.A. • 65 and Abbe’s Condenser with dark-ground illumination. 
Test Objects under Apochromatic Objectives: Zeiss’ 1/6 N.A. 
0 • 95 and 1/8 oil-immersion N.A. 1*40 and Abbe’s Achromatic 
Condenser. 
Amphipleura pellucida x 1500 under new formula 1/12 oil- 
immersion N.A. 1*25 (Student’s Series). 
New Microscope Lamp, with horizontal and vertical rack move- 
ments suggested by Rev. Dr. Dallinger. 
Automatic Microtome. 
Bausch & Lomb Optical Co. : — Microscopes and Objectives. 
Messrs. R. and J. Beck: — Podura Scale with new 1/18 oil-immersion. 
Amphipleura pellucida with new 1/20 oil-immersion. 
Mr. W. A. Bevington : — Section of Head of Indian Locust. 
Mr. A. C. Cole: — Transverse Section of Human Left Median Nerve, 
stained for Photomicrography ; and Photograph of the same slide. 
Optical Vesicle of a Human Embryo in the sixth week. T. S. 
Mr. Crisp : — Stereo-photomicrographs of Human Embryos. 
Mr. Dadswell : — Coryne pusilla. 
Membranipora pilosa. 
Mr. F. Enock : — Slides of various Insects. 
Mr. H. Epps : — Section of Bean, Cacao Theobroma , showing starch-grains 
in situ. 
Mr. H. E. Freeman : — Parasite of Humble Bee, Trichodactylus sp. 
Mr. C. Haughton Gill : — Diatoms prepared by a new method. 
Mr. W. Godden : — Diatoms from Skye, N.B. 
Mr. W. Goodwin : — Diatoms illuminated by new superstage illuminator. 
Prof. J. W. Groves : — Transverse Section of Root of Iris Jlorentina. 
Transverse Section of Root of Acorus calamus , stained with acid 
methyl-green and borax-carmine. 
Mr. J. D. Hardy : — Vesicularia valkeria. 
Mr. John Hood : — Bursaria truncatella , adult form. 
Mr. J. E. Ingpen : — Licmophora Jlabellata mounted in saturated solution 
of common salt by Mr. J. G. Tatem. 
Cephalosiphon, &c. 
Mr. R. Macer : — Melicerta tubicolaria. 
Mr. A. D. Michael : — Cothurnicella cordieri from Cherchel, Algeria. 
