The Planetesimal Hypothesis

Abstract

THIS book, which appeared on the author's eighty-fifth birthday, and less than two months before his lamented death, is a summary of the well-known planetesimal hypothesis of the origin of the solar system which, with the collabora tion of Prof. P. R. Moulton, he developed during the last thirty years. While the greater part of the book is a restatement of previously published re sults, some new material is included, and the whole forms a compact and useful account of a hypothesis which, whatever may be its ultimate fate, must take high rank among the generalisations which have stimulated and elucidated geophysical research during this century.

The Two Solar Families: the Sun's Children.

By Prof. Thomas Chrowder Chamberlin. (University of Chicago Science Series.) Pp. xxii + 311. (Chicago: University of Chicago Press; London: Cambridge University Press, 1928.) 12s. 6d. net.