Calculations and tables have been copied verbatim although some contain calculation errors.
Some reference letters in the text are missing from the illustrations.
Changes made:
Tables and illustrations have been moved to between paragraphs; some of the plates have been rotated.
Some minor typographic errors have been corrected and some missing punctuation has been added silently.
Page 40: plate V changed to plate V.
Page 109: Curtiss’ and Harvey’s changed to Curtis’s and Harvey’s.
Page 166: Curtis’s and Harvey changed to Curtis’s and Harvey’s.