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REPORTS ON THE STATE OF SCIENCE.
Report on the Recent Progress and Present Condition of the Ma-
thematical Theories of Electricity, Magnetism, and Heat. By
the Rev. W. WHEWELL, Fellow and Tutor of Trinity College,
Cambridge
Aperçu de l'Etat actuel des Sciences Mathématiques chez les
Belges. Par A. QUETELET, Directeur de l'Observatoire de
Bruxelles
On the Phænomena of Terrestrial Magnetism. Being an Abstract
of the Magnetismus der Erde of Professor CH. HANSTEEN. By
Captain EDWARD SABINE, R.A., F.R.S.
RESEARCHES
...
Page
V
Vill
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xill
xli
UNDERTAKEN AT THE REQUEST OR SUGGESTION OF THE ASSOCIATION.
1
35
61
Report on the Comparative Measurement of the Aberdeen Stand-
ard Scale. By FRANCIS BAILY, Treas. Royal Society, &c..... 91
Impact upon Beams. By EATON HODGKINSON....
93
Observations on the Direction and Intensity of the Terrestrial
Magnetic Force in Ireland, made by the Rev. HUMPHREY LLOYD,
M.A., F.R.S., &c., Professor of Natural Philosophy in the Uni-
versity of Dublin; by Captain EDWARD SABINE, R.A., F.R.S.,
&c.; and by Captain JAMES CLARKE ROSS, R.N., F.R.S., &c.. 117