Transcriber’s Corrections:

Obvious typographical errors have been corrected as follows:

Page [127]: “in the magnetic meridian, then”—had “meridan.”

Page [128]: “mainly of the postscript, with”—had “postcript.”

Page [134]: “paper of April 2, 1821,[22] is quite”—had “1921.”

Page [135]: “thermoelectric circuits, where”—had “thermoelectirc.”

Page [135]: “arrangement has resulted.”—had “arragnement.”

Page [135]: “King of the American Institute of Physics.”—had “Physic.”

Footnote [13]: “Geschichte der Elektrizität”—had “Elektrizitat.”

Footnote [16]: “Journal für Chemie und Physik”—had “and.”