Punctuation, hyphenation, and spelling were made consistent when a predominant preference was found in the original book; otherwise they were not changed. Subsection headers in Chapter XI and XII are formatted inconsistently, this has been retained. The index was not checked for proper alphabetization or correct page references. Except for those changes noted below, all misspellings in the text, and inconsistent or archaic usage, have been retained. Pg. 51 “thetr” replaced with “their” Pg. 104 “to power the tone” replaced with “to lower the tone” Pg. 117 “urpentine” replaced with “turpentine” Pg. 129 “vermillion” replaced with “vermilion”