ADJOUKNED DISCUSSION IN LONDON. 



April 2ist, 1920. 



The Koyal Microscopical Society held a special 

 meeting on April 21st, 1920, in the Rooms of the Society 

 at 20, Hanover Square, London, W., in conjunction with 

 the Optical Society and the Faraday Society, to discuss the 

 papers presented to the Symposium which dealt with the 

 " Mechanical Design and Optics of the Microscope." 



Professor John Eyre, President of the Eoyal Micro- 

 scopical Society, who was in the Chair during the first part, 

 of the proceedings, opened the Discussion with the 

 following remarks : — 



The object of our meeting this evening is not to initiate a fresh 

 discussion on the microscope, but to continue the work which was 

 commenced at the Symposium held in January last. The volume 

 of communications which was simply poured upon the Symposium 

 was so great that it was impossible to discuss more than a very few 

 of them, and, indeed, many papers were only presented in abstract, 

 but in order to correlate the views of all the workers in this branch 

 of science, we are arranging a series of short meetings in which 

 spe-cially selected papers can be discussed, and the results of the 

 discussion recorded for publication. During the course of the evening 

 my two confreres, Sir Robert Hadfield, President of the Faraday 

 Society, and Mr. R. S. "Whipple, President of the Optical Society, 

 will each take the Chair for a period, in order that the members of 

 their Societies may feel that they are adequately represented. 



The Chairman then called upon Mr. J. E. Barnard to give a 

 General Survey of the subject (see page 37), after which abstracts 

 of the following papers, read at the original meeting, were presented" 

 by their respective authors : 



THE MECHANICAL DESIGN OF THE MICROSCOPE. 



(a) General. 



Professor F. J. Cheshire, C.B.E., " The Mechanical Design 

 of Microscopes." 



Mr. Conrad Beck, C.B.E., '' The Standard Microscope." 



Mr. F. W. Watson Baker, " Progress in Microscopy from a 

 Manufacturer's Point of View." 



Mr. Powell Swift, "A New Research Microscope." 



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