The headings in the Table of Contents do not necessarily correspond
to headings in the text. A few examples will be mentioned. There is
no heading for "PART I." in the text, though "PART II." is present.
There are two headings "CAMERA BOXES" in the Table of Contents, but
only one in the body. A second, matching one, has been added on page
110. The Table of Contents lists several types of pneumatic shutter
for pp 124-129 that do not appear in the text under the same names.
In the Table of Contents, under the level-three heading "GELATINO
EMULSION" at page 38, the two level-four headings "Preparation of
Glass" and "Coating Glass" occur in the text under a level-three
heading "DESCRIPTION OF APPARATUS USED IN MAKING AND WASHING
EMULSIONS." on page 44, which corresponds to a level-three heading
in the Table of Contents "APPARATUS USED IN MAKING EMULSIONS". This
heading seems to refer to the same section of text as the level-four
heading "Apparatus for Making" in the Table of Contents under page 38.
In the Table of Contents under heading at page 181, "How to Use the."
was changed to "How to Use them." A few other such simple printing
errors have been fixed silently.
Some captions of images or tables originally functioned in situ as
section headings; some of these have roughly corresponding entries in
the Table of Contents.
Originally, and in the html version of this ebook, section headings
or captions of images or tables may also function in situ as part of
the body text. In this text version, such captions and illustrations
have been retained. However, any images that were originally embedded
within paragraphs were moved out of paragraphs to between paragraphs,
and if necessary, the caption was then duplicated in the text. Some
illustrations that originally had no captions have been provided with
captions labeled with "TN:".
In the table on page 43, showing the formulæ for gelatine emulsion,
the fifth row duplicates the third row, probably erroneously.
The name "Ever" appears in the table of contents twice, in connection
with Emulsions C and D, under the section starting at p 38. This name
is spelled "Eder" on pp 43 and 44.