230 



PHQ TO-AriCROGRAPHY 



[CH. VIII 





FIG. 179. Microscope of Voigtlander & So/in with large tube delicate fine 

 adjustment and mechanical stage suitable for photo-micrography. See also 

 Figs. 79, 84, .S'p, 95. (Cut loaned by Voightldnder & Sohn. ) 



