INTRODUCTORY ADDRESS 



By SIR ROBERT HADFIELD. Bart.. D.Sc, D.Met., FR.S. 

 President of the Faraday Society. 



SECTION L— INTRODUCTION. 



As the result of some suggestions I made several months ago to the 

 Council of the Faraday Society, it was arranged to hold this present 

 Symposium on "The Microscope and its Applications." The Royal 

 Microscopical Society (Mr. J. W. Barnard, President) : the Optical 

 Society (Professor F. J. Cheshire, President) ; and the Photomicro 

 graphic Society (Mr. F. Martin Duncan, President) all most cordially 

 approved and agreed to co-operate with us. In view of the fact 

 that the objects of the Faraday Society, as set forth in its Con- 

 stitution, are not only to promote the study of Electrochemistry, 

 Electrometallurgy, Physical Chemistry and Kindred Subjects, but also 

 Metallography this Symposium is specially appropriate. It is only, 

 or at any rate chiefly, the last named Branch of Research — Metal- 

 lography — m)^ own remarks are meant to cover, that is, I do not 

 pretend in this Address to deal with the Work of the Microscope as 

 employed by the Geologist, the Zoologist, the Biologist, and other 

 Branches. 



During the preparation of this Address I found the interesting 

 frontispiece of the Book by George Adams, " ESSAYS ON 

 THE MICROSCOPE." This was published July 1st, 1787, and 

 contains a Practical Description of the Most Improved Microscopes, 

 revised by Frederick Kanmacher, F.L.S., 1798. I thought this 

 illustration particularly appropriate to form the frontispiece to 

 this present Address of mine. The quaint wording at the foot 

 of the Engraving 



'' 9trutlj trisrotr^rmg to ®im£, S^runa tnstnuting Ijer 

 fflljtltrr^n in tljt SltnproiJBm^nts an iljt Jltirrnsrop^/' 



w^ell describes the object of our present Symposium. 



As regards the modern application of the Microscope including 

 that to Metallography, below is a portion of the preface to Monsieur 

 Felix Robin's Work " Treatise on Metallography," contributed by 

 Professor F. Osmond, who did so much for Metallurgy, and from 



