PKOCEEDINas OF THE SOCIETY. 551 



Cornelius Varley more than forty years ago, but now selflom met 

 with, though there were few methods of illumination more cflfective. 



Mr. Crisp referred to a communication from E. Hallier as to the 



cause of the movements of diatoms (see p. 509), in which the author 

 did not agree with the view expressed by C. Moreschkowsky, founded 

 on the phenomena of endosmose and exosmose (see p. 102). 



The President said if they wanted to see diatoms to the best 

 advantage they must try and see them under their natural circum- 

 stances. If they were put upon a slide with a glass cover over them, 

 the water became chilled, and their movements were to a great extent 

 stopped ; but if the slide was slightly warmed their activity was 

 increased to a much greater degree than usual. Under proper con- 

 ditions, with a y\j-inch objective, he had distinctly seen the wavy 

 movement of the protoplasm on the outside; but the impression was 

 strong upon his mind that there was something else concerned in the 

 movement in addition to this. It struck him that a good deal of the 

 movement was produced by the action of heat currents in the water, 

 for the things were so light as to be most easily influenced in that 

 wav. 



The President reminded the Fellows that the second Conversazione 

 of the session would take ]jlace on the 20th inst. 



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

 Mr. Beck : — " Economic " Microscope with swinging substage. 

 Mr. Crisp: — (1) Butterfield Broad-gauge Screw. (2) German 

 Movable Stage. 



Mr. Powell: — ^ Oil-immersion Objective of 1 '47 Num. Ap. 

 Mr. Stewart :— Section of Indian Wood ("Muhkta"). 



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

 Messrs. W. P. Collins, C. Thomas, F.G.S., W. Thompson, and T. P. 

 Watson. 



Conversazione. 

 The Second Conversazione of the Session was held on the 

 20th April in the Libraries of King's College, when the following 

 objects, &c., were exhibited: — 



Mr. C. Baker : 



Model Histological Microscope and Histological ditto by Carl 

 Zeiss. 

 Mr. E. J. Creese: 



Bread from the Ruins of Pompeii. 

 Mr. T. Curties : 



Indian Parasites. 



