

LIST OF TEXT ILLUSTHATIONS 



xi 



FIG. 





PAGE 



46. 



Delicacy op Lens-Mounts with Objectives of High N. A. 



85 



47- 



Abbe's Apertometee, by Zeiss ....... 



88 



48. 



Stop for Giving Dark Ground Illumination or Annular Light, 







Special Arrangement by Author ...... 



95 



49. 



Aplanatic Condenser .......... 



97 



5°- 



Uncorrected Lens .......... 



97 



ST- 



Over Corrected Lens .......... 



97 



52- 



Under Corrected Lens ......... 



97 



S3- 



Powell & Lbaland 1-40 Achromatic Condenser with Stops 



100 



S4- 



Beck's Achromatic Condenser 1-30 



lOI 



55- 



Zeiss Achromatic Condenser ro 



lOI 



56. 



Auxiliary Condenser, Mounted by Watson 



lOS 



S7- 



Auxiliary Condenser, after Author's Pattern 



loS 



S8. 



Arrangement by Zeiss for giving Oblique Light 



III 



S9- 



Diagram Explaining "Areas" versus "Diameters" .... 





60. 



Diagram Explaining " Areas " versus " Diamkters " . 



IIS 



61. 



Details of a Means for Excluding Light at Junction of Camera 







AND Microscope .......... 



118 



62. 



How TO Fix Microscope on Baseboard 



n8 



63- 



Vertical Illuminator, by Zeiss ....... 



133 



