Abstract
THIS widely used handbook contains all the old well-known features, and in addition some new ones. The astronomical, physical, and political tables are very full; there are useful maps of the magnetic declination, inclination, and horizontal force in France in 1911, also full instructions for constructing sundials, and a set of star maps, with directions for their use. M. G. Bigourdan contributes a useful and lucid article on the proper motions and radial velocities of the stars, addressed to readers who have little previous knowledge of the subject. Gen. Bourgeois contributes a biographical notice of Gen. Bassot (1841-1916), whose name is well known among workers on geodesy. The civil day (commencing at midnight) is used throughout this handbook; this system will become universal at the beginning of 1925.
Annuaire pour l'An 1921, publié par le Bureau des Longitudes.
Pp. viii + 710 + A42 + B17 + C69. (Paris: Gauthier-Villars et Cie, n.d.) 8 francs net.
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Annuaire pour l'An 1921, publié par le Bureau des Longitudes. Nature 107, 200 (1921). https://doi.org/10.1038/107200d0
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DOI: https://doi.org/10.1038/107200d0