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 function in situ as section headings; some of these have roughly corresponding entries in the Table of Contents.
Section headings or captions of images or tables may also function in situ as part of the body text. In this html version, such captions and illustrations have been retained. Many images were originally embedded within paragraphs. Some such images were moved out of paragraphs to between or beside them, when such a move did not disrupt the text.
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.