274 



Transactions of the Society. 



VIII. — New Finder for the Microscope. 



By Joseph M. Coon. 



Being engaged on research work necessitating frequent reference 

 to the microscopical slides prepared in connection therewith, and 

 requiring to indicate parts to correspondents, the usual methods of 

 " finding " were found to be less convenient than is desirable. 



On any given Microscope provided with a divided stage or 

 engraved Wright's Finder, it is easy to " re-find " parts wanted by a 

 simple method of registration ; but without calculations or the con- 

 struction of a new register for each instrument in use, slides 

 " registered " on one Microscope cannot be "found" on another, 

 unless the instruments are exactly alike in their calibration — a most 

 unlikely occurrence. 



The Maltwood Finder enables different instruments to be used 



Fig. 40. 



if provided with a mechanical stage or Wright's Finder, but it is 

 difficult on instruments with sliding bar only, and much more so 

 if the stage is only provided with spring clips. Each " find " also 

 requires changing the slide for finder, and finder for slide, and thus 

 focusing twice. It will also be recognised that slight differences in 

 dimensions of glass on which Maltwood's Finder is printed, or in 

 position of ruling, will introduce difficulties from lack of inter- 

 changeability. 



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

 any Microscope, whether provided with mechanical stage, sliding 

 bar, or spring clips, and objects registered on one Microscope can be 

 found on any other ; and, further, any number of parts on a slide 



