New York and London: McGraw Hill Book Company, Inc. 1932. First Edition. xiii, 562 pages. Publisher's green cloth. Spine panel shellaced. A few page corners turned, previous owner stamps in multiple places, otherwise a sound copy. Good. Cloth. 
"Bacher will be remembered for his significant contributions to physics, education, and, as a public servant, to his country. In the 1930s he coauthored a standard work on atomic spectra [here offered], and went on to help Hans Bethe redefine the field of nuclear physics [working with him on the Bethe Bible]. During World War II, Bacher served as a leader in the efford to develop radar at the Massachusetts Institute of Technology (MIT) Radiation Laboratory, and went on to play a critical role in building the atomic bombs at Los Alamos, New Mexico. In the decades following the war, Bacher held a number of federal posts before turning his attention to the California Institute of Technology (Caltech), an institution he helped restructure and modernize. Though history has often overlooked Bacher, he clearly remains one of the most talented, versatile, and influential physicists of his generation."
"A seminal work that is still referenced in the early twenty-first century"
(New DSB, Vol 1, p 133).