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NOTE ON A NEW FINDER FOR THE MICROSCOPE. 



By J. M. Coon. 



{Read before the Royal Microscopical Society, March 2s///. 1906. j 



Being engaged on some research work necessitating frequent 

 reference to microscopical slides, and also the indication of definite 

 parts of these slides to correspondents, I found the usual methods 

 for " finding" less convenient than desirable. 



On any given microscope provided with a divided stage or 

 Wright's Finder, it is easy to " find " objects on the slide by a 

 simple method of registration ; but calculations, or the con- 

 struction of a new register, must be made for each microscope in 

 use, as a slide registered on one cannot have parts found on 

 another unless they are exactly alike in their calibration — 

 a most unlikely occurrence, even witli the same maker's 

 instruments. 



The Maltwood Finder will do this on a microscope with a 

 mechanical stage, or Wright's Finder ; but it is difficult on 

 instruments with a sliding bar only, and much more so when the 

 stage is only provided with spring clips. Further, each operation 

 requires the changing of the slide for the finder and the finder 

 for the slide, and twice focussing, occupying, to say the 

 least, the expenditure of an unnecessary amount of time 

 and effort. 



The finder now described is extremely simple, can be used on 

 any microscope, and will find on any stage, whether mechanical 

 or provided with sliding bar or spring clips ; and slides regi>tei ed 



