„ on evolution of the chemical elements, 80, 89
„ on the pre-nebular condition of matter, 98
Comets, according to Laplace, strangers to our system, 17
„ according to Prof. A. Winchell, strangers to our system, 17
Crookes, Mr. W., on the pre-nebular condition of matter, 90-98
Darwin, Mr. Charles, on geological time, 67
Denudation, age of the globe as represented by, 63, 64
„ in past ages not much greater than at present, 44
„ method employed to estimate its rate, 39, 47
„ Mr. A. R. Wallace’s method of estimating its rate, 51
„ of Mississippi basin, Sir Charles Lyell on, 44
„ Prof. Haughton’s method of estimating its rate, 50
„ Rotation of the earth in relation to, 46
„ the direct method of estimating its rate, 52
„ time required to effect the amount of, 63
Dewar and Liveing on dissociation of chemical elements, 83
Dissociation of chemical elements, Dr. T. Sterry Hunt on, 82, 85
„ of chemical elements, M. Berthelot on, 83
„ of chemical elements, M. Deville on, 83
„ of chemical elements, Mr. Lockyer on, 82
„ of chemical elements, Profs. Liveing and Dewar on, 83
„ of chemical elements, Prof. Schuster on, 83
„ of chemical elements, Sir B. Brodie on, 82, 84
„ Dumas, M., on essential unity of matter, 83
„ rotation, its influence on denudation, 46
Emmons, Mr. S. F., on a fault in Aqui Range, 58
Energy existing as motion of stellar masses, 3
Evolution, can it be traced back to a first condition? 110
„ evidence of, from the grouping of the stars, 81
„ from smaller to larger aggregates of matter, 81
Faults, evidence of rate of denudation from, 53
Gaseous condition essential to the nebular hypothesis, 25
„ state, second condition of a nebula, 24
Geological epochs of past ages, misconceptions regarding, 49
Geological time, Mr. A. R. Wallace on, 65
Geology, testimony of, in regard to age of sun’s heat, 39
Glacial epoch, age of the earth as determined by, 64
Gravitation does not account for the heat required, 106
„ does not account for motion of the stars, 105
„ insufficient to account for heat of nebulæ, 27
Grove, Sir W. R., on the pre-nebular condition of matter, 78
Haughton, Prof., method of estimating rate of denudation, 50
Huggins, Mr., and Dr. Miller on spectra of nebulæ with one nitrogen line, 84
Hull, Prof., on denudation of Pendle Range, 60