PROCEEDINGS OF THE SOCIETY. 807 



the core melted and dropped out almost at once. The best experimental 

 result he had obtained was by using thin silver tubes and filling them 

 with cadmium. The silver and cadmium formed an alloy of higher 

 melting point in the arc, but sooner or later a stage was reached, which 

 was dependent on the current density, when the whole of the cadmium 

 melted and ran out. Another objection to the use of a carbon electrode 

 with a metallic core was that the continuous spectrum of carbon obtruded 

 itself on the line spectrum of the metal, and so the whole object of the 

 arrangement was lost. 



Mr. Barnard read a paper on " A Simple Method of obtaining 

 Instantaneous Photomicrographs." 



Mr. Earland asked whether the method could be used in photograph- 

 ing opaque objects ? 



Mr. Barnard replied that it could quite well. Provided the light 

 was sufficiently powerful there was no limit to the application of the 

 method in the direction indicated. 



The thanks of the Meeting were accorded to Mr. Barnard for his 

 interesting communications. 



It was announced that the next Meeting of the Society would take 

 place on December 21. 



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



The Society : — Slide of Navicula Jyra, abnormal form, sent for ex- 

 hibition by Mr. Walter Bagshaw ; two Spread Slides of Diatoms 

 containing Pleurosigma sp., presented by the Hon. T. Kirkman. 



The following Slides, presented by Mr. M. J. Allan : Bryum sp., 

 mounted in fluid ; Bugula dentata, showing polyps ; Gorgonia sp., 

 spicules ; Marine Algre with Diatoms in situ, mounted in fluid ; 

 Stellar ia media, flower, mounted in fluid ; Trochodota dimedinensis, 

 eggs ; Tubularia larynx, showing young Medusae ; Young Orange, 

 transverse section of stem, double staining. 



Microscope by Oberhaeuser and Hartnack, presented by Mrs. 

 Wesche ; Old Ivory " Sliders " containing objects, and a "Slider" 

 containing magnifiers in a brass holder, presented by Mr. H. C. 

 Gooding ; Old Pocket Magnifiers in brass box, presented by Mr. 

 Chas. Lees Curties. 



The President : — Drawings and preserved Specimens of Japanese Sea- 

 Pens ; Diagrams illustrating Dr. Gemmill's papers. 



Mr. A. E. Hilton :— The following Mounted Specimens of British Myce- 

 tozoa : Arcyria albida, Sporangia on rotten wood, Spores partially 

 dispersed ; A. ferruginea, showing masses of Capillitiaand the stalked 

 membraneous cups, from which they have broken away; A.flava, 

 Expanded Capillitia, after dispersion of Spores ; A.punicea, Sporangia 

 after dispersion of Spores ; Badhamia foliicola, Sporangia formed by 

 revived sclerotium ; Chondrioderma spumarioides, Sporangia on leaf ; 

 Diet y diseth alt tnn plurribeum, iEthalium on rotten wood ; Didymium 



