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The Long and Evans Monograph on the Estrous Cycle in the Rat

This 1922 monograph (1) described for the first time with precision, accuracy, and detail the estrous cycle of this hardy, rapidly reproducing laboratory animal. It thus laid the foundation for its subsequent use in the isolation and characterization not only of ovarian hormones but also of hypophyseal gonadotropic hormones. Both authors were members of the University of California faculty in Berkeley, Long since 1908 and Evans since 1915. Long was a Ph.D. (1908) from Harvard where his doctoral dissertation under Prof. E. L. Mark had been on the maturation of the egg of the mouse, clearly the beginning of his work on reproductive physiology. Evans was an M.D. (1908) from Johns Hopkins to which he had transferred in 1905 from the University of California School of Medicine. Early in his student days at Hopkins he came under the influence of F. P.

Footnotes

"Remembrance" articles discuss people and events as remembered by the author. The opinion(s) expressed are solely those of the writer and do not reflect the view of the Journal or The Endocrine Society.

Received August 3, 1991.