STRÖMGREN, ELIS.

Ueber den Ursprung der Kometen mit wesentlicher Unterstützung des Mag. Johannes Braae.

Kopenhagen, Høst & Søn, 1914. 4to. Uncut in orig. printed wrappers. Offprint. (189-)250,(1) from "Mémoire de l'Academie Royale des Sciences et des Lettres de Danemark, Copenhague".

First printing. Strömgren proves that the hyperbolic character of a few orbits can be accounted for by planatary perturbations. Evidence is thus given for that these types of comets have not come from the outside, but all must have originated within the solar system.

Order-nr.: 41670