ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 



737 



pbragm, situated above tlie coiidenser, is provided for work with high- 

 power objectives. The specimens are placed upon the stage and fixed 

 thereon by means of cUps, care being taken that the cover-glass is turned 



Fig. 121. 



downwards so as to face the objective. The stage is provided with inter- 

 changeable stops of graded apertures, and the lens-holder has an adapter 

 for the accommodation of a nose-piece ; also an adapter for microsummar 



