As Footnote 1 states, technical terms are explained in the Index at the end of the book.

Punctuation and spelling were made consistent when a predominant preference was found in the original book; otherwise they were not changed.

Inconsistent hyphenation was not changed.

Simple typographical errors were corrected; unbalanced quotation marks were remedied when the change was obvious, and otherwise left unbalanced.

Figures 1 and 4 were repositioned slightly in the paragraphs that reference them, thereby splitting those paragraphs.

The uncaptioned illustration above the second advertisement is an image of that advertisement. The uncaptioned illustration at the end of the book is decorative.

The original book used middle-dots to represent decimal points; this eBook uses baseline periods.

The index was not checked for proper alphabetization or correct page references.