488 PROCEEDINGS OE THE SOCIETY. 



New Fellows : — The following were elected Honorary Fellows- 

 Prof. Gaston Bonnier, Prof. Jacques Bran, Prof. Yves Delage, Prof. 

 S. Ramon y Cajal, Prof. B. Renault, J. J. Harris Teall, Prof. Silvanus 

 P. Thompson, and Dr. M. Treub. 



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



Mr. C. Beck :— Portable Microscope, made by Messrs. R. & J. Beck 

 to the design of Mr. Arthur Hollick ; Microscope with grating on the 

 stage, showing doubling of the lines by means of a triple slit in back 

 focal-plane of the object-glass, in illustration of Prof. Everett's paper. 



Prof. Marcus Hartog : — A slide, showing the first segmentation 

 spindle and centrospheres in the embryo of Rhynchebnis (Leech), shown 

 under a J-inch objective and B eye-piece ; the preparation lent by Prof. 

 Vejdovsky, of Prague. 



Mr. T. H. Powell : — Phurosi-gma angulatum, under a ^-inch apo- 

 chromatic homogeneous immersion objective of N.A. 1*35. 



Mr. Julius Rheinberg : — Experiment showing movement of lines in 

 the image of a grating by creating a phase-difference amongst the spectra 

 in the back focal-plane of the objective by means of an Abbe glass- wedge 

 Compensator. Experiment to illustrate his remarks on Prof. Everett's 

 paper. 



After the business of the Ordinary Meeting was coneluded, a Special 

 Meeting was held, pursuant to notice given at the Ordinary Meeting of 

 May 18 last, for the purpose of making an alteration in By-law No. 25, 

 by the omission of the word " future." 



Mr. Vezey explained that the effect of the proposed alteration would 

 be to relieve a new Fellow, who might be desirous of compounding for 

 his subscriptions on election, from the necessity of paying his first year's 

 subscription as well as the full compounding fee. The entrance fee 

 would, of course, be payable whether a Fellow compounded or not. 



The rule as it originally stood, and also as it would be if altered, was 

 then read to the Meeting, and the proposal for alteration having been 

 put to the Meeting by the President, it was declared to have been 

 unanimously carried. 



