INDEX 



Abbe, Ernst, 217 

 Abderhalden, E., 130 

 Academic dcs Sciences, 85, 86 

 Academy of Agricultural Science, 



183 

 Accademia del Cimento, 85 

 Acetic anhydride, 128 

 Acetylene, 125 

 Achromatism, 98 

 Acton, Lord, 233 

 Adams, Brooks, 72 

 Agricola, 77 

 Agriculture, 26 

 Alaric, 27 

 Alchemy, 119 

 Alembert, Jean d', 92 

 Alexandria, 72, 88, 144 

 Alexandrian school, 67 

 Aliphatic chemistry, 125 

 Alkaloids, 130 

 Alpha particles, 111 

 Alpha rays, 136 

 American Philosophical Society, 



86, 87 

 Amici, Giovanni, 157 

 Ampere, A. M., 104 

 Anatomy, 78, 144, 145 

 Anaximander, 70 

 Andromeda nebulae, 117 

 Animal colonies, 178 

 Animals, respiration of, 152 

 Anode rays, 108 

 Anthrax, 166 

 "Anticipations," 174 

 Arabic philosophy, 76 

 Arabic translations, 76 

 Arabs, settling of, 38 



Archaeology and history, 17, 18 



Archimedes, 67, 72 



Argon, 116, 134 



Aristarchus, 72 



Aristophanes, 95 



Aristotle, 71, 72, 74, 75, 76, 78, 



79, 80, 88, 95, 144, 226 

 Aristotle's elements. 93 

 Armour Research Foundation, 216 

 Aromatic chemistry, 125 

 Arrhenius, Svante, 131, 133 

 Art, cycles of, 39 



development of, 21 



introduction of, 25 



modern, 39 

 Aston, F. W., 108, 138, 177 

 Astrology, 41 

 Astronomer Royal, 176 

 Astronomy, 41, 88, 115, 116 

 Astrophysics, 117 

 Atlantis, New, 82 

 Atom, Bohr-Rutherford, 112, 137, 

 140 



Rutherford, 111, 137 

 Atomic bombs, 143 

 Atomic nuclei, 140 



disintegration of, 141, 142, 143 



fission of, 142 

 Atomic numbers, 137 

 Atomic structure, 137, 138 

 Atomic theory, 93, 121 

 Atomic weights, 138 

 Attila, 27 



Augustine, St., 5, 74 

 Aurelius, Marcus, 4 

 Authority, doctrine of, 75 



237 



