In a former article the writer called attention to the fact that the La Placian hypothesis has been abandoned by scientists because of the serious astronomical, biological, dynamical, and geological difficulties encountered. The Planetesimal or Accretion hypothesis, which has superseded it, is the gift of Doctor T. C. Chamberlin, formerly head of the Department of Geology at the University of Chicago and Director of the United States Geological Survey.
©1931 by Iowa State Teachers College
Cable, E. J.
"The Planetesimal Hypothesis,"
Science Bulletin: Vol. 3:
5, Article 4.
Available at: https://scholarworks.uni.edu/science_bulletin/vol3/iss5/4