616 



SUMMAKY OF CURRKNT EESEAECHES RELATING TO 



Fig, 94 is for the instantaneous photomicrography of heated objects 

 (e.g. molten crystals) with simultaneous subjective observation. 



Koristka's Large Model Stand He.*— This instrument (fig. 95) 

 corresponds to the stand lie on page 21 of the maker's catalogue N 12. 



Fig. 94. 



It is fitted with a complete Abbe apparatus (condenser of N.A. 1-40) 

 and iris diaphragm ; diaphragms are introduced by a cylinder into the 

 condenser. The circular ebonite stage has a diameter of 110 mm. ; it 

 is rotatory, and is governed by clamping screws for the adjustment of 

 the preparation. The tube of the objective-holder is of ample dimen- 



* Supplement to General Catalogue N 12, Milan, April 1907. 



