CONTENTS. 



PAGE 



To keep the Emulsion ..... 86 



To prepare the Silver - - - - -87 



Description of Washing Box - 87 

 Description of Apparatus for Melting and Filtering the 



Emulsion ...... 88 



Description of Levelling Slab ... 89 



To Develop . . . 90 



Formula for Developing 91 



List of Articles Needed ..... 92 



Cleaning and Preparing the Glass - 92 



CHAPTER VI. 



Former Methods adopted in the Arrangement of the Apparatus 101 



Later Methods 103 



The Method adopted in this Work - - - - 105 



Dr. Dallinger's Illumination .... - 124 



CHAPTEE VII. 



Defects in Negatives - - - 140 



Their Kemedy - - . - < - 141 



CHAPTER VIII. 



Production of Positives ------ 149 



Enlarging - - ----- 159 



Appendix - - 163 



Preservative Media - .... 163 



Bacillus Tuberculosis - - 163 



Binocular Photography - . 164 



Focussing at a Distance ..... 164 



