Physical description:

Held by: Department of Special Collections, Van Pelt Library, University of Pennsylvania [call number: Van Pelt Library Special Collections E. F. Smith Collection Boyle 33]

Facsimile note: The pages of the text appear at approximately twice the size of the original. Their exact size will vary with monitors. They have been adjusted for clarity and visibility. No other alterations or enhancements have been made. These adjustments may occasionally result in color and brightness variations which exaggerate those of the original.

Note: there are several errors in pagination in the printed edition reproduced here. Mis-numbered and out-of-sequence pages have been rearranged in logical order for this facsimile. The reader should also note that some material was omitted between pages 187 and page 188; this material was placed by the printer at the end of the volume, beginning on page 437.

Table of Contents

• [Title Page]
• Praeface Introductory
• Physiological Considerations
• [Title Page]
• The First Part
• The Second Part
• The Third Part
• The Fourth Part
• The Fifth Part
• The Sixth Part (A Paradoxical Appendix)
• The Conclusion
• [A note from the printer about material missing from page 187]
• Errata