230 



PHOTO-MICROGRAPHY iff J. VIII 



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

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

 Figs. /</, 8./, 89, 95. (Cut loaned by / 'oighi/andcr & Sohn. ) 



