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Tables of Physical and Chemical Constants; and some Mathematical Functions

Nature volume 119, page 193 (05 February 1927) | Download Citation



Six years have elapsed since the publication of the fourth edition of these invaluable tables, and it is significant of the change in scientific outlook that the first page of the book is now devoted to atomic numbers and the last to a new table of isotopes. In the list of elements in the order of atomic numbers, three numbers only, 61, 85, and 87, are still unrepresented; the first of these gaps will now be filled by the new element illinium, the isolation of which was reported in NATURE of June 5, 1926, p. 792. New matter has been added on the mechanical equivalent of heat, a subject which Prof. Laby has personally investigated, and the weighted mean of the determinations of Joule's equivalent made since 1880 is given as 4.182 ′ 107 ergs per 20° calorie on the scale of the hydrogen thermometer.

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