go 



L .//.'( )RA '/'< )RY i MICROSCOPES 



[ CI I. II 



Figs. 85, 86. Quei 



^..een & Co's Continental Mia 

 proof, triple nose-piece. I 



■oscope, i\'o. II. Dust- 

 n this and the 



he difference between this and the ordinary form 

 can he seen by comparing with Fig. 87. This form of revolving nose-piece has 

 been made for many years by Winkel of Goeltmgen. See legend of Fig. 40. 



