The historiography of early twentieth-century physics has been dominated by the formation and developments of quantum mechanics, relativity, and atomic and nuclear physics. Many applied fields of physics closely related to industry, military, and government laboratories, where most physicists were employed, have largely been neglected. This discrepancy becomes apparent upon examination of the war effort during World War I, where physicists worked on wireless communication, sound ranging, and other fields not necessarily associated with modern physics. Chen-Pang Yeang’ s history of the physics of long-wave radio communication and its transformation into atmospheric science is an important and necessary extension of our perspective in this respect.