INDEX 



469 



Water immersion objectives, 21, 80, 



296 

 Wave lengths, designation, 255-256 



scale of, 255 

 Wax models, 412-413 



paraffin, 363, 375 _ 38° 

 Wenham's binocular microscope, 84 

 Wire gauze experiment with, 122 

 Wiring for arc lamp, 202 

 Wistar Institute Style Brief and jour- 

 nals, 188-190 

 Wollaston's cameia lucida, 162 



Work-room for drawing and photo-mi- 

 crography, 217 

 Working distance (fig.), 40-43 



free, 39-40 

 Writing diamond, 401 



X 



Xylene, 350 



balsam, 350 

 Xylol, xylene, 350 



Z 



Zenker's fluid, 366 



