484 



SUMMARY OF CURRENT RESEARCHES RELATING TO 



is unusually deeply cut out, so that the optical axis of the tube can lie 

 over the centre of a 250 by 250 mm. object-stage. The form of stand 

 especially adapts it for the examination of brain sections or other such 

 extensive preparations. 



Czapski's Cornea-Microscope.*— Fig. 96 shows this instrument with 

 its base-plate and Everbusch chindjolder. The Greenhough binocular 



Fig. 96. 



is, in this case, provided over the centre line between the double tubes, 

 with an illuminating tube, whose axes converge to the same point as 

 the axes of the two Microscopes. In this tube is an incandescent electric 

 lamp with a two-strand illuminating system so that the most favourable 

 light for the examination of the patient's eye can be found. The whole 

 of the upper part can rotate and be clamped in a vertical plane about a 



* Zeiss' Catalogue, 1902, No. 98, fig. 37, p. 76. 



