This file uses _underscores_ to indicate italic text. New original cover
art included with this eBook is granted to the public domain. Itemized
changes from the original text:
• p. 212: Replaced comma with period after phrase “the experiment would
not succeed if the person lifted were placed upon a board.”
• p. 212: Replaced comma with period after phrase “thin plates of brass
of an elliptical form, exactly resembling each other.”
• p. 212: Replaced “fo ding-doors” with “folding-doors” in phrase “The
folding-doors remain shut, and the drawer is returned empty.”
• p. 212: Added period after phrase “seen through an iron railing from
Newgate-street.”
• p. 215: Added period after phrase “because uniformly diffused, is not
felt.”