436 EDWARD M. NELSON ON THE BINOCULAR MICROSCOPE:. 



2. Different kinds of binoculars, with identically the saine^ 



measured magnifying powers, yield different apparent 

 magnified images. 



3. While some objects show little, if any, diff'erence in stereo- 



scopic relief with' different kinds of binoculars, other objects 

 show much difference. 



4. Different kinds of binoculars show different apparent magni- 



fying powers when one eye or two eyes are used. 



5. The "aulax" in an Actinosphenia splendens is white on a 



dark ground if the angle of the substage condenser is 

 low, but black if the angle is wide. 



6. A pit and unevenness in the floor of Coscinodiscus radiatusr 



is discovered with a Parallel tube binocular. 



7. Fine adjustment for setting the interpupillary distance ol 



tubes in Parallel tube binoculars. 



Journ. Queketl Microscopical Club, Ser. '2, Vol. XIII , JVo. 83, November 1918. 



