1. Carnegie Institution of Washington: Department of Terrestrial Magnetism. Publication 578: Description of the Earth‘s Main Magnetic Field and its Secular Change, 1905–1945. By E. H. Vestine, Lucile Laporte, Caroline Cooper, Isabelle Lange and W. C. Hendrix. Pp. v+532. (Washington, D.C.: Carnegie Institution, 1947.) 2.50 dollars.
2. Carnegie Institution of Washington: Department of Terrestrial Magnetism. Final Values of Elements of the Geomagnetic Field at 5-Degree Intervals of Latitude and Longitude, Epoch 1945. By L. Laporte, C. Cooper, I. Lange, W. C. Hendrix and E. H. Vestine. Pp. 73. (Washington, D.C.: Carnegie Institution, 1946.) n.p.