The Sun and Stars ¹

Abstract

VIII. FOR the purpose of this lecture I have ventured to make a -1 revision of the classification which has been suggested by Dr. Vogel. I should tell you, with reference to this question of classification, that Rutherford started it; then the German physicist. Prof. Zöllner, recommended a certain line of arrangement Which practically had been adopted by Father Secchi. I afterwards saw grounds for saying that that line of arrangement, or sequence, was apparently a very just one, because it seemed, from some considerations I brought forward, that it really arranges the stars in the order in which the various phenomena would be produced in the atmosphere of any one of them; that is. to say, that it was a true evolutionary line starting from the conditions of highest temperature. Others have followed in the same track since, including Dr. Vogel; but, so far as I can make out, any credit which is due to the existing arrangement is due to Father Secchi and to Prof. Zöllner.