Arcturus, motion of, [16]

Atmosphere, universal, [82]

„ Dr. Hunt on, [86]

„ Mr. Mattieu Williams on, [86]

Atomic weights, logarithmic law of, [100]

Atoms, according to Herschel and Clerk-Maxwell, manufactured articles, [92]

Binary systems, [32]

„ Dr. Johnstone Stoney on, [33]

„ Sir W. Thomson on, [33]

Biology, testimony of, as to age of sun’s heat, [65]