549 



Note on a Metallurgical Stage. 



By W. B. Stokes. 



{Read March 20th, 1903.) 



The appliance exhibited may be said to effect a temporary con- 

 version of any microscope possessing a focussing substage into a 

 stand suited to the needs of metallurgists. 



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When using the " vertical iilluminator," it is found that a 

 change of object often involves a considerable change in the 

 illumination, but by giving the stage a focussing movement the 

 lighting arrangements remain undisturbed. In stands specially 

 made for metallurgists, this extra movement is provided ; 

 the aim of the present accessory is to supply this movement 

 to an ordinary microscope. Taking advantage of the substage 



