proceedincxs of the society. 411 



Exhibit of The Royal Microscopical Society at the British 

 Scientific Products Exhibition, 1918. 



Your President has to report that in July Inst he was informed by 

 the British Science Guild that it was about to ori^anize the British 

 Scientific Products Exhibition, 1918, at Kind's Colleffe, and he was 

 asked whether the Royal Microscopical Society would be prepared to 

 assist in its endeavour to enlist the aid of Science in the industrial 

 development of the Empire. Considerinsj that it would be advisable for 

 the Society to take an active part in such an exhibition, he convened a 

 meeting of a Special Executive Committee, wliich was held on July I'l. 

 At this meetitii^ it was agreed that, subject to the approval of the 

 Members of the Council, the Society should armno-e to send a selection 

 of instruments from its collection to illustrate the Evolution of the 

 British Microscope, and that in connexion therewith there should also 

 be demonstrations showing a number of bacteriological, pathological, 

 and other slides that had been stained by means of British-made dyes. 



The Members of the Council were unanimous in their support of the 

 proposition, and many offered personal help in furtherinij the success 

 of the project. A special room was set apart at the Exhibition for the 

 exclusive use of the Society, and an exhibit of twenty-seven British 

 microscopes, illustrating the types in use during the last two centuries, 

 was arranged. 



The Exhibition was open for four weeks, August 12 to September 7, 

 and during this period demonstrntions were given each Tuesday after- 

 noon and each Thursday evening. A great amount of interest was 

 aroused by the Society's exhibit and demonstrations, an interest which 

 cannot fail to be of benefit to the Society ; and the President desires to 

 record his sincere thanks to those who assisted, among whom were 

 Miss Francis, and Messrs. S. C. Akehurst, C. F. Hill, T. H. Hiscott, 

 R. Paulson, I). J. Scourfield, C. D. vSoar, and J. Wilson ; and also to 

 the following, who very kindly lent modern microscopes for the purpose 

 of the demonstrations : Dr. Eyre, Dr. Gordon, Messrs. Angus, Hill, and 

 Lancaster, King's College, and King's College for Women. 



On Tuesday, August 20, your President gave an address in the 

 Exhibition Lecture Theatre on " The Evolution of the English JMicro- 

 scope." Dr. Walmsley presided. There was a good attendance, and a 

 remme of the address will appear in the published Record of the 

 Exhibition which is being prepared by the British Science Guild. 



The following is the list of Instruments exhibited to illustrate 

 The Evolution of the British Microscope. 



1. John Marshall "Double" Microscope, 1744. Invented about 

 1704. (R.M.S. Cat. No. G.) Type— Compound Microscope, uncorrected. 

 This instrument was described in the original advertisement as "John 

 Marshall's New Invented Double Microscope for Viewing the Circula- 

 tion of the Blood." The word "double" here signifies that it was a 



