232 



PROCEEDINGS. 



August 11th, 1876. — Conversational Meeting. 



The following objects were exhibited : — 

 Marine Polyzoa, &c., from Ilfracornbe 

 Stylops Spencii, male, emerging from the 



body of a wild bee 

 Vertical Section of Rhinoceros Horn 

 Flints containing Pyritised Structure 

 Sections of Norway Birch (Betula alba) 

 Sertularia bryonia 



} 



Mr. W. G. Cocks. 

 Mr. F. Enoch. 



Mr. A. H. Halley. 

 Mr. M. H. Johnson. 

 Mr. Sigsworth. 

 Mr. S.Turner. 



Attendance — Members, 34 ; Visitors, 6. 



from the Publisher. 



» fi 



„ Society. 



„ Publisher, 

 in exchange, 

 by purchase, 

 for the album. 



August 25th, 1876 — Ordinary Meeting. 

 Henry Lee, Esq., F.L.S., &c, President, in the Chair. 



The minutes of the preceding meeting were not read, the minute book 

 not being available. 



The following donations were announced : — 

 " Monthly Microscopical Journal " 

 "Science Gossip" 



" Proceedings of the Royal Society " 

 "American Journal of Microscopy" 

 "American Naturalist"... 

 " Darwin's Insectivorous Plants " 

 Photograph of Mr. A. Cottam 

 The thanks of the meeting were voted to the donors. 

 The usual ballot for new members was postponed by reason of the certi- 

 ficates being in the minute book. 



The Secretary read an additional note to Mr. Bridgman's paper, " On the 

 Principles of Illumination," and stated that the author had partially re- 

 written that paper for publication, omitting some of the theoretical matter, 

 and adding further details of the mode of working. 



The President having invited discussion, Dr. Matthews said that he had 

 tried the apparatus in question, and that it appeared to him to be very 

 similar in principle to his own illuminator, which reflected rays at any 

 desired angle, and was perfectly under control. He considered that too 

 great obliquity of the rays was an evil, as one shadow was cast over and 

 interfered with another. He also considered that Mr. Bramhall's illuminator 

 had been anticipated by the well known Amici prism with the flat surface 

 silvered. 



