410 



INDEX. 



w. 



Weights recognised, 321. 



Wen ham 'a reflex illuminator 

 157. 



Wide apertures, lessons in the 

 use of. 261 



Wide apertures, management 

 of 258. 



Wide angle objectives, 137. 



Wide angle objectives and col- 

 lar adjustment. 139. 



Wide angle objectives and illu- 

 mination. 140. 



Wide angle objectives and 

 working distance, 137. 



Work table, 229. 



Working with higher powers, 

 235. 



Working with lower powers, 



Working distance of high an- 

 gles, 137. 



Working distance of high bal- 

 sam angles, 143. 



Working distance of objectives, 

 108. 



Working distance vs. angle 

 aperture, 115,121. 



Woodward's illuminator, 163. 



Woodward's illuminator modi- 

 fied, experience with, 177. 



Z. 



Zentmayer's stands, 34, 355. 



Zentraayer's American Centen- 

 nial, 34. 



Zentrnayer's American Histo- 

 logical,39. 



