216 PKOCEEDINGS OF THE SOCIETY. 



He further reported thafc as a member of a deputation from the 

 Optical Society which waited upon the Board of Trade on March 8, 

 he had fully explained the views of the Council of the Royal Micro- 

 scopical Society to the Board of Trade officials. The Board of Trade 

 had therefore asked that the proposed deputation from this Society 

 should not wait upon them unless it was desired to raise any new points. 



The President moved the confirmation of the foregoing resolutions. 

 This was carried with one dissentient. 



Exhibits were shown by Dr. Murray, Mr. E. J. Sheppard and Mr. 

 Whitfield, who were accorded the thanks of the meeting. 



Donations were reported from : — 

 The City of Birmingham — 



Metallurgical Specimens. 

 Mr. C. D. Soar— 



A Wilson Pocket Microscope (1702) and Case of 

 Ivory Mounts. 

 This instrument is unengraved, but typical of those produced by 

 Culpeper. It is the pocket form without attachment for handle or 

 stand ; apparently it is an early model, as the later forms usually had 

 the under surface of the lens polished, so as to act as a Lieberkuhn. 

 The accessories accompanying the instrument are three object-glasses, 

 one box for talcs, one brass slide with glass concavities, and one brass 

 sHder, with ten ivory sUders in separate sharkskin case. 

 Mr. J. T. N. Thomas- 

 Slide of Astromma Aristotelis. 

 Mr. G. T. Harris— 



A Collection of Slides of Alga^. 

 On the motion of the President, hearty votes of thanks were accorded 

 to the donors. 



Mr. B. K. Johnson (Imperial College of Science and Technology) 

 read a paper on '• Polarizers for the Microscope." 



Mr. John H. Pledge, F.R.M.S., read a paper on " The Use of Light 

 Filters in Microscopy." 



On the motion of the • President, hearty votesi of thanks were 

 accorded to the authors of the papers. 



The President announced that the next meeting would be held on 

 April 20, and that the Biological Section would meet on April 6, when 

 Mr. E. J. Sheppard would give a Demonstration on the Microtome. 



The business proceedings then terminated. 



