at Plymouth is
mentioned in the Association's annual reports from 1838. There were a
number of earlier self-registering anemometers, but no evidence of their
extended use. See J. K. Laughton, "Historical Sketch of Anemometry and
Anemometers," _Quarterly Journal of the Royal Meteorological Society_,
1882, vol. 8, pp. 161-188.

[18] On Ronalds' work see reports of the British Association for the
Advancement of Science, from 1846 to 1850. On Brooke's work see
_Philosophical Transactions of the Royal Society of London_, 1847, vol.
137, pp. 59-68.

[19] C. Abbe, "The Meteorological Work of the U.S. Signal Service, 1870
to 1871," in Fassig, _op. cit._ (footnote 12), pt. 2, 1895, p. 263.

[20] _Annual Report of the Director of the Meteorological Observatory_,
Central Park, New York, 1871, p. 1ff.

[21] _Oesterreichische Gesellschaft fuer Meteorologie, Zeitschrift_,
1871, vol. 6, pp. 104, 117.

[22] P. H. Carl, _Repertorium fuer physikalische Technik_, Munich, 1867,
p. 162ff.

[23] E. Lacroix, _Etudes sur l'Exposition de 1867_, Paris, 1867, vol. 2,
p. 313ff. See also, Reports of the U.S. Commissioners to the Paris
Universal Exposition, 1867, vol. 3, Washington, 1870, p. 570ff.

[24] _Annals of the Dudley Observatory_, 1871, vol. 2, p. vii ff.

[25] Karl Kreil, _Entwurf eines meteorologischen Beobachtungs-Systems
fuer die oesterreichische Monarchie_, Vienna, 1850.

[26] _Report of the 13th Meeting of the British Association for the
Advancement of Science_, 1843, 1844, p. xi ff. I have found no other
reference to this instrument. Considerable attention was given to the
thermometer, however, for Wheatstone proposed to send it aloft in a
balloon for the measurement of temperatures at high altitudes. A small
clock caused a vertical rack to ascend and descend once in six minutes.
The rack carried a platinum wire which moved within the thermometer over
28 degrees. From a galvanic battery and a galvanometer on the ground two
insulated copper wires were to extend to the balloon, one connected to
the mercury and the other to the clock frame. The deflection of the
galvanometer was to be timed with a second clock on the ground.
(Professor Wheatstone, "Report on the Electro-Magnetic Meteorological
Register," _Mechanics' Magazine_, London, 1843, vol. 39, p. 204).

[27] In 1662 Hooke had proposed the use of a bimetallic pendulum for the
temperature compensation of clocks. Thermometers on this principle were
described to the Royal