AUTHORS CONSULTED. 



ABBOTT . Bacon and Essex. 



AGASSIZ , .. ..=... . Etudes sur les Glaciers. Essay on 



Classification. 



AIRY . Elementary Astronomy. On Gravitation. 



ALLEN, GRANT . . . Life of Darwin. 



AMPERE .-..'. . . Observations Electro-Dynamiques. 



ANTHROPOLOGICAL JOURNAL. 



ARAGO Biographies of Scientific Men. Eloge de 



Laplace. Eloge de Fresnel. Vie et 

 Travaux de Herschel. 



ARGYLL - . .' ' . . Reign of Law. 



ARISTOTLE . . -. . Works. 



ASA GRAY . .' .". . Botany. 



BABBAGE . . . . Ninth Bridgewater Treatise. 



BACON, ROGER . . . Opus Majus. Opus Tertium. De Mir. 



Pot. 



BACON, FRANCIS . . . Works (Spedding-Ellis Edition). 



BADEN-POWELL . . . History of Natural Philosophy. The 



Unity of Worlds and of Nature. 



BALFOUR, F. M. . . . Treatise of Comparative Embryology. 



BALFOUR STEWART . . On Heat. Lessons in Elementary Physics. 



BALL . . . . '. . A Short History of Mathematics. Experi- 

 mental Mechanics. 



BEALE, LIONEL . 1; 2 . On Protoplasm. 



BECCARIA . . ... Dei Delitti e delle Pene. 



BECKMANN . . .,...:. History of Inventions. 



BENNETT . . . . Text-Book of Physiology. 



BERNARD . ... LeQons de Physiologic ExpeVimentale. 



BIOGRAPHIE UNIVERSELLE (Nouvelle). 



