380 PKO(!EEDINaS OF THE SOCIETY. 



referring to infinitesimal pencils only, and tlie action of wide pencils, 

 although of course the important point for the Microscope, was left 

 imconsidered. It would obviously therefore be ungracious for those 

 whose optical education had happened to fall upon more enlightened 

 times, to depreciate others who, whilst having had an equal will for 

 learning, had undoubtedly had much less opportunity. 



What, however, he (Mr. Crisp) had said as to the necessity for 

 clearing one point before passing to another, equally of course applied 

 even if — as Mr. Shadbolt put it, and as every one would be very ready 

 to believe — it was not by his " fault " but only by " misfortune " that 

 he had fallen into his mistake. 



Professor Abbe's paper " On the Estimation of Aperture in the 

 Microscope " was taken as read. 



The President announced that the second " Scientific Evening " 

 of the Session had been arranged to be held on the 20th April. 



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



Mr. Crisp : — (1) Abbe's Eadiation Apparatus for demonstrating 

 the increased radiation of light in balsam and glass as compared with 

 air (see p. 343). (2) The Griffith Club Portable Microscope (see 

 p. 293). (3) Murray and Heath's Polarizing Apparatus (see p. 302). 

 (4) Slide for showing that the aperture of an objective is not " cut 

 down " by a balsam-mounted object, but remains the same as on a dry 

 object. 



Mr. Curties : — An Amici Eeflecting Microscope. 



Mr. Michael : — Dermaleichus heter-opiis. 



Mr. Reed : — Stained section of embryo of Mistletoe. 



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

 Messrs. A. A. Bragdon, R. T. Burnett, H. C. Luck, F.R.G.S., 

 W. Hideout, D. G. Simpson, and W. G. Tacey, L.S.A. 



Walter W. Reeves, 



Assist.-Secretary. 



