980 PROCEEDINGS OP THE SOCIETY. 



being crushed, which would be sure to occur if the cover were shifted 

 in the least degree. The contrivance to which he referred (see p. 946) 

 consisted of a triangular piece of glass about 2 inches on the base ; 

 at a short distance from each angle a small block of vulcanite was 

 cemented upon the glass and a small piece of thin glass was fitted 

 between them so that it could not be shifted laterally ; in the centre 

 of the thin glass a hole was drilled, and a small metal ring was 

 cemented round the hole. Under the thin glass some thin strips of 

 blotting-paper were fixed, and if water was slowly dropped into the 

 hole it was drawn off imder the thin glass by means of the blotting- 

 paper. The slide answered its purpose so well practically that he 

 thought it was worth bringing before the notice of the Meeting. 



Mr. Stewart thought it probable that minute organisms might get 

 under the blotting-paper or entangled amongst its fibres. 



Mr. Curties said that the thin disk of glass was held down in its 

 place by small vulcanized rings fitting over the vulcanite blocks. 

 He had found that these blocks were liable to get loose, so that it 

 would probably be necessary to make them of glass. 



Mr. Watson exhibited and described a form of Stephenson's 

 Safety Stage, which was more simple than any which had hitherto 

 been made. 



The Chairman announced that the first Conversazione of the 

 Session would be held on the 7th December, and expressed a hope 

 that there would be a better exhibition of objects than on the previous 

 occasion. 



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



Mr. Bolton : — Vorticellee and Acinetfe. 



Mr. Crisp :— (1) French Pocket Microscope (see p. 809), (2) Salt's 

 Pocket Microscope (see p. 936), (3) Sidle's "Acme" No. 4 Micro- 

 scope (see p. 657), (4) Watson's Nose-piece for Analyzer, Wenham 

 Prism and Vertical Illuminator, and (5) Holmgren's Apparatus for 

 observing the circulation in the lung of a frog. 



Mr. Crossley : — Microscope with special arrangement for illu- 

 minating the swinging substage (see p. 653). 



Mr. Dreyfus: — Slides of Fungi by Dr. Zimmermann of Chemnitz. 



Dr. Klein : — Nachet's New Pocket Microscope. 



Mr. J. Mayall, jun. : — (1) Abbe's Apertometer of dense glass, 

 (2) Fasoldt's Test-plate (see p. 949). 



Eev. L. G. Mills : — Diatoms from Peruvian guano (see p. 865). 



Mr. Stephenson: — Surirella gemma mounted in phosphorus. 



Mr. Watson : — (1) Microscope of similar construction to that 

 figured ante, p. 517, (2) New form of Stephenson's Safety Stage. 



New Fellows : — The following were elected Ordinary Fellows : — 

 Messrs. Eobert Bygott, Walter T. Christian, F. Howard Collins, 

 George Healey, Charles Newton, Joseph B. Eobinson, and Louis A. 

 Sillem. 



Walter W. Reeves, 



Assist. -Secretary . 



