260 PROCEEDINGS OF THE 



Librarian was empowered to receive such offers for them and to 

 accept those which he deemed satisfactory. It was not possible 

 to bring them up for inspection, as there was about a ton and 

 a half of them. 



A visitor, Mr. J. Watson, exhibited multiple images formed by 

 the cornea of the eye of a hive bee mounted dry. 



Mr. J. Watson said the slide was that of the eye of a honey 

 bee prepared so as to show the portrait of the bee-keeper in every 

 facet just as the bee would see it. He had been told it could be 

 done with the eye of a beetle, but that the hairs on the eye of the 

 bee made it a difficult matter to accomplish; but by mounting the 

 object in the way he described, so that the hairs were free from 

 pressure on the under side of the slide, he had succeeded in 

 obtaining the desired result, and he had obtained a good photo- 

 graph of it with half an hour's exposure. 



The President said that at a Society such as theirs it w r as 

 needless to explain that this was not the view which the bee got, 

 as no doubt in some way it saw a single image, but he just men- 

 tioned this to prevent any mistake, as he thought he heard it 

 stated that this was how the bee saw the bee-master. Multiple 

 images such as were shown could be got in a variety of ways, and 

 he remembered that exactly the same thing was done at one of 

 the Royal Society's soirees with the epidermic cells of a plant. 

 They were, however, much obliged to Mr. Watson for bringing 

 and explaining his exhibit. 



Mr. E. Inwards had found that a small knob fitted near the 

 hinge -joint of the stop-carrier of substage condensers was more 

 convenient in working than having to feel on the right for the 

 usual long projecting end, which is very often in close proximity 

 to the iris-handle. 



Mr. T. A. O'Donohoe read a paper illustrated by a number of 

 lantern photographs, at various degrees of magnification, of the 

 " Minute Structure of Coscinodiscus asteromjrfialus and of the two 

 species of Plenrosigma, P. angulatium and P. balticum. Mr. 

 O'Donohoe then showed an interesting series of photographs, at 

 various magnifications, of P. balticum, some showing fine, hair- 

 like, bent fibrils breaking away from the valve. Others showed 

 the outer membrane breaking up into fibrils, and sometimes 

 isolated dots. 



Mr. W. E. Brown said that the fibrils shown by Mr. O'Donohoe 



