Transcriber's Note
Obvious typographical errors have been silently corrected.
Hyphenation has been standardised.
Variations in spelling, punctuation and accents are as in the original.
Repetition of the titles of Books 2 and 3 has been removed
Page 433, para 154, "There is no need of attributing to the inligent spirit...." Inligent corrected to intelligent.
Page 486, "II. The relations of our organs [to] objects are intrinsically immutable." The to has been added.