APPENDIX. 



749 



The whole stage may also be concentrically rotated ; 

 this is most essential in the examination of the markings 

 on certain test objects ; and, what is very important, there 

 is no danger of the apparatus getting out of order. For 

 histological work, and for the teacher who wishes to 

 demonstrate any peculiar feature of an object, it is 



Pig. 361. — Browning's Student's Microscope. 



certain to prove exceedingly useful. The stage can be 

 added to any instrument. 



browning's complete microscope. 



Mr. Browning's Student's Complete Microscope differs 

 from the educational instruments of other makers, possessing 



