510 



SUMMARY OF CURRENT RESEARCHES RELATING TO 



Fio. 102. 



enlarged to 11 cm. in widtli. and in addition four arms 4 cm. long 

 can be extended wlicn desired from the sides of the stage. 



For the purjiosc of examining 

 sections of the entire human brain 

 Prof. C. Giacomini has constructed 

 the Microscope shown in figs. 102 

 and 103, whicli appears to be prac- 

 tically identical witli Schieck's. 

 The pillar supporting the stage is 

 in its normal position, and the 

 aperture in the stage is retained 

 at a short distance (4 • 5 cm.) from 

 the front edge of the stage, so 

 that there is no such obstruction 

 of light as would take i)lace if the 

 aperture (and with it the mirror) 

 were placed further back at tlie 

 centre of the enlarged stage. The 

 jiillar, however, whicli carries tlie 

 arm for the body-tube is moved 

 much further backwards, so as 

 to leave a distance of 15 '5 cm. 

 between it and the stage aper- 

 ture. The stage is therefore 20 cm. 

 from back to front, and its width 

 can be increased so as to take slides up to 34 cm. by attaching to it the 

 two supports shown in fig. 103, on which the ends of the slide rest. 



Fig. 103. 



As there is some inconvenience in leaning over the instrument to 

 reach the eye-piece, an Amici prism is used to divert the rays at an 

 anc/le of 3(f. 



