110 PEOCEEDINGS OF THE SOCIETY. 



of lantern slides, microscopical slides, fresh specimens, and book-plates or 

 photographs purchased by the Society, the following donations were 

 received : — 

 March 21st :— 



Stand for the Society's 1917 projection apparatus. Presented 

 by Mr. J. E. Barnard and Mr. C. F. Hill. 

 October 17th :— 



An old Microscope of the Ellis Aquatic type. Presented bv 



Mr. P. E. Ptadley. 

 A small collection of Accessories. Presented by Mr. Ingpen : — 



1. An Immersion Paraboloid Illuminator devised by Dr. 



James Edmunds. 



2. A Substage Condenser for Oblique Light. 



3. An Abbe Diffraction-plate, Diaphragm, and Carrier. 



4. The Abbe " aa " Objective used by Professor Abbe in 



demonstrating his Diffraction Theory. 



CJt^INET. 



The work of re-organizing the collection, with a view to weeding out 

 the useless slides and making the valualtle ones more easily accessible to 

 Fellows, has been entrusted to Messrs. Earland and Sheppard, and has 

 already made considerable progress. 



The following additions have been made to the Slide Cabinet during 

 the past year : — 



March 21st : — Four slides of Mycetozoa. Presented by Mr. H. J. 

 Howard. 



MEETINGS. 



The full number of Ordinary Meetings has been held during the 

 year, and have, on the whole, been well attended by Fellows and visitors, 

 despite travelling difficulties and lighting restrictions. 



Original communications, probably owing to the fact that Fellows are 

 Ibecoming more deeply involved in war work, have been less numerous and 

 voluminous than in 1916, although quite as important. 



The Council is pleased to note that the miscellaneous exhibits, dealt 

 with prior to the evening's " paper," have increased in number and 

 interest. This is a particularly valuable feature of the Meetings, and one 

 ■which should especially appeal to research workers as affording a means 

 of discussing observations and testing theories during th6 progress of 

 their work, and before their main results are ready for publication. 



Of the Sectional Meetings, those devoted to Biology have alone 

 survived the strain of war conditions ; indeed the Biology Section may 

 be congratulated on a very good Session's work. Eight Meetings have 

 been held, with an average attendance of 22" 4 — the highest recorded 

 since the Section was instituted. 



CONJOINT BOARD OF SCIENTIFIC SOCIETIES. 



An attempt has now been made to correlate the activities of the 

 various Scientific Societies of Great Britain, and to prevent loss of energy 



