Transcriber’s Notes:
Illustrations have been moved to paragraph breaks near where they are mentioned.
Punctuation has been made consistent.
Variations in spelling and hyphenation were retained as they appear in the original publication, except as noted below.
The following changes were made:
p. 97: sentiment changed to sentient (all sentient beings)
p. 131: unwanted changed to unwonted (with unwonted vigor)
p. 314: , changed to a (have a faultless)
p. 330: apartment changed to department (mathematical department in)