Christian Wolff:Elementa matheseos universae, Tomus V, Halle 1741. Reprinted: Hildesheim (Georg Olms) 1971, (II Abteilung, Band 33 von Christian Wolffs Gesammelte Werke) S. x + 683, DM 98,‐Hidehiko Yamabe:Collected Works, ed. Ralph P. Boas, New York, London, Paris (Gordon and Breach, Science Publishers) 1967, pp. XII + 142. $ 7.50.A. J. Meadows:Early Solar Physics, London (Pergamon Press) 1970, pp. VIII + 312, hard cover sh. 45.‐, $ 7.‐, flexicover sh. 35.‐, $ 4.75.J. M. Bijvoet, W. G. Burgers and G. Hägg (eds.):Early Papers on Diffraction of X‐rays by Crystals, Utrecht (Oosthoek) 1969, XVI + 372 pp, 93 fig., 8 pl., Gld. 48.‐, $13.50, £ 5.14.Hans Hausen:The History of Geology and Mineralogy in Finland 1828–1918. Societas Scientiarum Fennica, Helsinki 1968, pp. 147.Armin Geus (Hrsg.):Indices naturwissenschaftlich‐medizinischer Periodica bis 1850, Band 1: “Der Naturforscher”1774–1804, 182 S., quart., broschiert DM 69.‐ (Anton Hiersemann, Stuttgart).D. V. Subba Reddy:Glimpses of Health and Medicine in Mauryan Empire, Indian Council of Medical Research, Hyderabad, 1966, pp 97.Mireille Wiriot:L'enseignement clinique dans les hopitaux de Paris entre 1794 et 1848; Paris (Faculté de médecine de Paris) 1970, pp. 233.T. B. McCulley:Man against Disease, London (Pergamon Press) 1970, pp. 102, sh. 10.‐, $ 1.75.Augstin Jal:Nouveau glossaire nautique, A(ed. Michel Mollat), Hauge (Mouton&Co.)