The Light from the Sky

Abstract

THIS volume is the fourth part of the late Prof. Pernter's work on meteorological optics, a notice of the earlier parts of which appeared in NATURE on April 18, 1907. It was undertaken in March, 1908, by Dr. Exner at Pernter's request, at a time when the latter's condition of health not only made it impossible that he should complete the work himself, but prevented him from giving any material assistance or advice in its preparation. The scope of the section was clearly indicated in the original plan of the work, and as regards the method of presentation Exner has successfully followed that of the preceding sections; but he had no notes to assist him, and the volume must therefore be regarded as Exner's work, except in so far as he has utilised, in some portions, Pernter's previously published papers.

Meteorologische Optik.

By Prof. J. M. Pernter. Section IV. Pp. i-xvii, 559-799. By Felix M. Exner. (Vienna and Leipzig: W. Braumüller, 1910.)