6. A mixed fraction is indicated with a hyphen and forward slash. For
example, 3-1/2 represents three and a half.
7. The following misprints have been corrected:
"1/0000" corrected to "1/1000" (page 111)
"strucure" corrected to "structure" (page 139)
"fevric" corrected to "ferric" (page 141)
"d'antorite" corrected to "d'autorite" (page 188)
"resourses" corrected to "resources" (page 206)
8. Other than the corrections listed above, printer's inconsistencies in
spelling, punctuation, and ligature usage have been retained.