252 PROCEEDINGS OF THE SOCIETY. 



The President said that he could only repeat that they were very 

 much indebted to their Fellow, Mr. Gordon, for this very excellent com- 

 munication. Those who had been privileged to listen to the Author's 

 able resume of his paper might have obtained some idea of Hclmholtz' 

 theory of the Microscope, but they would be glad to know that they 

 would have the opportunity of reading the paper in extenso for themselves 

 when printed in the Journal. 



The President announced that Mr. Fletcher, of the Mineral Depart- 

 ment of the Natural History Museum, would be delighted to give a 

 demonstration of Mineralogy to those Fellows of the Society who 

 wished to visit the Natural History Museum on April 18, meeting, as 

 before, at the Owen statue at 2 o'clock. He was quite sure that those 

 who accepted the invitation would find that Mr. Fletcher was able to 

 make the subject a most interesting and attractive one, as he had a 

 happy way of describing what was to be seen, so that those who listened 

 to his remarks on the wonderful collection of minerals under his charge 

 would be sure to derive both pleasure and profit. 



The following Instruments, Objects, &c, were exhibited : — 



Mr. J. Pillischer : — A Microscope made by M. Pillischer about 1847, 

 fitted with Sir Charles Tomes' stage. 



Mr. J. W. Gordon : — Experiments with seven Microscopes (lent by 

 Messrs. Beck) in illustration of his paper, and a Microscope (lent by 

 Mr. Kussell Clarke) fitted with electric illuminating apparatus and an 

 electrically driven screen. 



Mr. Rousselet : — A Bausch and Lomb " B B Continental Micro- 

 scope " sent for exhibition by Messrs. A. E. Staley & Co. 



New Fellows :— The following were elected Ordinary Fellows of 

 the Society : — Rev. James Feather, Messrs. Frederick E. Ives, J. Inder- 

 wick Pigg, and Joseph Henry Scott. 



