A Manual of Photographic Chemistry, Including the Practice of the Collodion Process
CHAPTER V.
CLASSIFICATION OF CAUSES OF FAILURE IN THE COLLODION PROCESS.
Section I.--_Imperfections in Negative and Positive Collodion Photographs._--Fogging.--Transparent and opaque spots.--Markings of all kinds--under- and over-exposure, etc. 276
Section II.--_Imperfections in Paper Positives_ 285