706 



SUMMARY OF CURRENT RESEARCHES RELATING TO 



adjustment, the front lens of A A must be about 1 mm. from the 

 mount of D*. On the tube a (fig. 109) of the Microscope stand the 



Fig. 110. 



objective D* is fastened with a sliding; objective change-piece. On this 

 objective a special holder secures the cuvette used for observation. 



