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Published online by Cambridge University Press: 01 May 2009

page 475 note 1 One horse-power is a rate of performing work equal to 33,000 foot-pounds per minute.
page 475 note 2 Kilometre=.62138 of a British statute mile.
page 475 note 3 On this subject see the valuable papers in the Geological Magazine, by Mr. G. Poulett Scrope, Vol. VI., p.145; M. Delauny, Vol. V., p. 507; and Mr. D. Forbes, Vol. IV., 1867.