Spectra (1932), which they dedicated to Randall. In the second year of his National Research Council Fellowship, Bacher moved across the country to the Massachusetts Institute of Technology to work with John C. Slater, who had taught Bacher at Harvard. While there, Slater asked him to conduct a seminar on John Chadwick's recent discovery of the neutron. Reading Chadwick's paper, he realized that anomalies in then-current theory would be resolved if the spin of the neutron was . This became the subject of a letter he submitted to the Physical Review with visiting scholar Edward Condon. A year later, Bacher became the first to suggest the neutron had a magnetic moment equal to about minus one nuclear magneton, based on the unusually small magnetic moment of nitrogen determined from its hyperfine structure. Afterwards Bacher returned to the University of Michigan on an Alfred H. Lloyd Fellowship. Jobs were hard to find at this time due to the Great Depression, and in 1934 he accepted a job at Columbia University, where he worked with Isidor Isaac Rabi, Jerrold Zacharias, Jerome Kellogg and Sid Millman. However it was difficult living in New York on his salary, and Jean gave birth to their first child, Martha, in December 1935. A second child, Andrew, was born in 1938. Bacher therefore accepted an offer from Hans Bethe to work with him at Cornell University in Ithaca, New York. Ithaca was a university town similar to Ann Arbor, where Bacher and Jean had been raised. At Cornell Bacher worked with Bethe on his book Nuclear Physics. A: Stationary States of Nuclei (1936), the first of three books that would become known as the "Bethe Bible". World War II Radiation Laboratory In December 1940 Bacher joined the Radiation Laboratory at MIT, but did not immediately cease his research. He reached an arrangement with its director, Lee Alvin DuBridge, to return to Cornell for four days every three weeks until it was completed. He was researching the neutron cross section of cadmium, a topic of interest to Enrico Fermi, who was attempting to build a nuclear reactor, but whose figures did not agree with Bacher's. Bacher carefully checked his results, and Fermi, convinced of their correctness, urged Bacher to publish them. Bacher submitted a paper to the Physical Review with instructions to withhold publication until after the war, and the paper was not published until 1946. DuBridge organized