_Annales de
Chimie et de Physique_ (1823), vol. 22, pp. 358-365.

[21] "Versuche mit dem electrisch-magnetischen Multiplicator," _Annalen
der Physik_ (1821), vol. 67, pp. 427-436.

[22] _Transactions of the Cambridge Philosophical Society_ (1821), vol.
1, pp. 269-278.

[23] Op. cit. (footnote 8).

[24] The German word _Kette_ has been translated as "circuit"
throughout. Although the equivalence of these words is clear, for
example, in Ohm's work of 1826, the context in which _Kette_ is
sometimes used in 1820 and 1821 indicates that the concept of a
"circuit," in the sense of the wiring external to the source of
electricity, has not been established. The wiring is regarded more as
something incidental, used to "close" the cell, the cell being
considered essentially the whole of the apparatus. This view underlies
the many attempts to correlate the Oersted phenomena with cell materials
and design, and with the use of such terms as "chemical magnetism" by
Erman and others.

[25] The reference here is to the Oersted-type experiments described in
two papers by authors other than Schweigger on pages 19 to 34 of the
volume.

[26] Op. cit. (footnote 19), pp. 422-426.

[27] One "line" seems to have been about 1/12 inch.

[28] J. G. POGGENDORF, "Physisch-chemische Untersuchungen zur naeheren
Kenntniss des Magnetismus der voltaischen Saeule," _Isis von Oken_
(1821), vol. 8, pp. 687-710. Most of Poggendorf's numerical data is also
in C. H. PFAFF, _Der Elektromagnetismus_ (Hamburg, 1824), along with
some of Pfaff's own work.

[29] Reported in _Annales de Chimie et de Physique_ (1820), vol. 15, pp.
222-223.

[30] "On the Development of Electro-Magnetism by Heat," _Transactions of
the Cambridge Philosophical Society_ (1823), vol. 2, pp. 47-76.

[31] "Account of the New Galvano-Magnetic Condenser invented by M.
Poggendorf of Berlin," _Edinburgh Philosophical Journal_ (July 1821),
vol. 5, pp. 112-113.

* * * * *

U.S. GOVERNMENT PRINTING OFFICE: 1964

For sale by the Superintendent of Documents, U.S. Government Printing
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INDEX

Aldini, Giovanni, 124

Ampere, Andre Marie, 127, 129

Arago, Dominique Francois Jean, 129

Bennet, Abraham, 124

Berzelius, Joens Jakob, 133

Bettany, G. T., 136

Biot, Jean Baptiste, 135

Carlisle, Anthony, 124

Cavallo, Tiberio, 124

Cavendish, Henry, 123

Cummings, James, 125, 127, 133