„ according to Prof. A. Winchell, strangers to our system, [17]

„ M. Faye on origin of, [17]

„ probable origin of, [17]

Compound radicals, argument from, [95]

Condensation in relation to nebulæ, [27]

„ the last condition of a nebula, [30]

Cosmical dust and “fire-mist,” [81], [102]

Crookes, Mr. W., on the pre-nebular condition of matter, [90]-[98]

„ on protyle, [96]

61 Cygni, motion of, [16]