Saigey, M., on ethereal origin of matter, [87]
Schmidt, Dr., on number of meteorites, [103]
Solar nebula, M. Laplace on heat of, [30]
„ Mr. Lockyer on condition essential to, [25]
„ Sir W. Thomson on, [6], [28]
Solar radiation, rate of, according to Pouillet and Langley, [35]
Solar system, Mr. R. A. Proctor on meteoric origin of, [23]
Star clusters, [34]
Stars, evidence of evolution from their grouping, [81]
„ how origin of by impact might not have been observed, [110]