he and a former student who was then on the staff of the Lick Observatory completed the book. Statistical Astronomy was published by the University of California Press in 1953 and was reprinted by Dover in 1962. It was Trumpler's last publication.

The Trumplers retired to Rio del Mar where he continued to work on his radial velocity data and to develop the large garden he so much enjoyed. They were founding members of the Unitarian Universalist Society in which they were very active. Trumpler's health began to fail rapidly after being diagnosed with leukemia. He died unexpectedly on September 10, 1956, after a few days in the hospital.

Trumpler was a member of the International Astronomical Union and many astronomical societies. He had been a councilor of the American Astronomical Society and twice was president of the Astronomical Society of the Pacific (1932 and 1949). He was elected to the National Academy of Sciences in 1932 and was a fellow of the American Academy of Arts and Sciences. To honor him as an outstanding teacher who guided many students through their theses, the Astronomical Society of the Pacific established the Trumpler Prize for the most outstanding Ph.D. thesis of the year; it has been given annually since 1974.

I AM GRATEFUL TO Dorothy Schaumberg, librarian at the Mary Lea Shane Archives at Lick Observatory, and to Jenny Mun at the National Academy of Sciences for information on several dates. I thank Alar Toomre for helpful suggestions relating to early drafts of this biographical memoir.



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