414 PROCEEDINGS OF THE SOCIETY. 



the picture. Mr. Wesche favoured the ordinary paraffin lamp, which 

 was a very excellent one within its limits, but of course they could not 

 get a greater intensity of light from it than the specific brightness of the 

 flame permitted, and, compared to the incandescent filaments, its specific 

 brightness was low, whilst if it was thrown out of focus, a great deal of 

 diffraction resulted. Mr. Rheinberg had invited him to a controversy 

 on the subject of the difference of phase, and although a controversy 

 with so genial an opponent was always agreeable, on this occasion he was 

 obliged to decline it, for the reason that he was in entire agreement with 

 Mr. Rheinberg on the point raised. The different parts of a flame were, 

 no doubt, in different phases, but in the Microscope we did not see the 

 actual flame, but its image, and after the light had passed through a 

 condenser the beams from different points in the flame would have so 

 modified one another that adjacent antipoints in the image would be by 

 no means independent of one another in respect of phase. This is 

 pointed out in one of Lord Rayleigh's papers, and he, the speaker, 

 thought that the interdependence of the various parts of the image in 

 respect of phase might be put even higher than Lord Rayleigh puts it in 

 that paper. 



Mr. Heron-Allen said that at the last Meeting of the Society he had 

 exhibited on the screen a large number of lantern slides representing 

 species of Foraminifera, that had been found by himself and Mr. Earland 

 in the Selsey Shore-sands, but he had since heard it stated that the 

 Fellows of the Society had been deceived on that occasion, because a 

 number of the slides were not taken from Selsey specimens. In explana- 

 tion of this he wished to say that rather than show pictures of damaged 

 or inferior specimens from Selsey they had selected perfect examples of 

 the same species from their own collections, and that the practice adopted 

 on that occasion would be adopted in future. 



The Chairman proposed that the thanks of the Society be given to 

 Messrs. Gordon, Heron-Allen, Earland and others, who had contributed 

 so much to the interest of their proceedings. 



This, on being put to the Meeting, was carried unanimously. 



The Chairman called attention to the exhibition of Pond Life which 

 had been prepared that evening, and moved that the best thanks of the 

 Society be given to those Fellows and to the Members of the Quekett 

 Microscopical Club who had been to so much trouble to insure the 

 success of the Exhibition. 



This was also unanimously carried. 



Notice was given, on behalf of the Council, that at the close of the 

 business of the next Ordinary Meeting on June 16th a Special 

 Meeting would be held for the purpose of receiving the Report of the 

 Committee appointed on December 16th, 1908, and of dealing with the 

 proposal to amend the By-laws of the Society. 



