X 



Libi Or" iJLAi iLLUiSiKAiiOJNb 





FIG. 





PAGE 



1 9a. 



Stand for Photo-Micrographs, by Beck ...... 



49 



1 9b. 



Beck's Lamp for Microscope Work and for Photo-Micrography 



50 



20. 



Stand for Photo-Micrography, by Swift & Son, after Pringle 



51 



2 I . 



Stand for Photo-Micrography, by Ross & Co. . . ... 



52 



2 2. 



Stand for Photo-Micrography, by Watson ..... 



52 



23- 



Stand for Photo-Micrography, by Zeiss ...... 



52 



24a. 



Stand for Photo-Micrography, simple form as used by Author 



54 



24b. 



Stand for Photo-Micrography, simple form with Accessories 



54 



24c. 



Stand for Photo-Micrography, Plan of Apparatus, Fig. 24a . 



54 



25- 



Vertical Apparatus, by Watson after Van Heurck 



56 



20. 



Vertical Apparatus, by Zeiss (New Pattern) ..... 



57 



27. 



A^'ertical Apparatus, by Zeiss (New Pattern) . . 



57 



28. 



Microscope adapted for Photo-Micrography, by Baksr, after Nelson 



60 



— 0 ^ 

 20a. 



Microscope adaptp;d for Photo-Micrography, by Beck 



61 



29. 



Microscope adapted for Photo-Micrography, by Powell & Lealand 



62 



30- 



Microscope adapted for Photo-Micrography, by Ross & Co. . 



63 



31- 



Microscope adapted for Photo-Micrography, by Swift & Son 



64 



32. 



Microscope adapted for Photo-Micrography, by Watson, Van 







Heurck Model .......... 



65 



33- 



Microscope adapted for Photo-Micrography, by Watson, Edin- 







burgh Model .......... 



66 



34- 



Microscope adapted for Photo-Micrography, by Watson, Fram 







Model ............ 



67 



35- 



Microscope adapted for Photo-Micrography, by Zeiss, as used by 







Author ............ 



60 



30- 



Microscope adapted for Photo-Micrography, by Zeiss, special 







Photo Model .......... 



69 



37- 



Fine Adjustment, after Watson ....... 



71 



3^- 



Fine Adjustment, by Baker — Campbell Differential Screw . 



72 



39- 



Objective Changer, by Zeiss ........ 



73 



40. 



Showing Incorrect Position of Lens on Camera . . . . 



74 



41. 



New Adaptable Mechanical Stage, by Baker 



76 



42. 



Mechanical Stage (Adaptable), by Baker, Mayall Pattern . 



76 



43- 



Mechanical Stage (Adaptable), by Zeiss, Mayall Pattern 



76 



44. 



Refraction of Light — Sine Law explained . . . . 



82 



45- 



Dry and Immersion Lenses, Path of Rays in each . . . . 



83 



