50 



Modern Microscopy. 



varying for nearly every instrument. This is much to be 

 deplored, as it gives a lot of trouble to workers, especially 



FIG. 10. Zeiss's Binocular Eyepiece. 



they require another maker's eyepiece. It could easily 

 be remedied, and would be a great boon. 



ACCESSORIES. 

 Illuminating Apparatus. 



A few years since all that was considered necessary in 

 order to illuminate in a proper manner an object under 

 examination was the mirror, perhaps in conjunction with 

 the stand condenser ; and in many cases the mirror was 

 hung on a tailpiece which could be moved in an arc round 



