Transcriber's Note:
- Minor typographical errors have been corrected without note.
- Punctuation and spelling were made consistent when a predominant form was found in this book; otherwise they were not changed.
- Ambiguous hyphens at the ends of lines were retained.
- Mid-paragraph illustrations have been moved between paragraphs and some illustrations have been moved closer to the text that references them.
- Each page starts with a biblical quotation. They were moved between paragraphs when needed.
- p. ix: LESSON XI follows LESSON XII. This was not changed.
- p. 151: Two consecutive questions are labeled 666. This was not changed.
- p. 177: Question 892 was mislabeled. Changed to 802.
- pp. 199 and 201 each have a question 869. This was not changed.
- p. 232. "F. The muscle situated underneath, ..." This muscle is shown above in Fig. 61.
- p. 251: "... that required to be removed..." changed to "... that are required to be removed"....
- p. 253: "... destruction of the optic,..." changed to "... destruction of the optic nerve,..."
- p. 286: "... that minerals, and animals..." changed to "... animals..."
- p. 293: Two consecutive questions are labeled 1167. This was not changed.