chapter XII

. Virchow: _J. Hop. Univ. Circulars_, vol. XI, 1891, Celebration of Seventieth Birthday of Virchow, Addresses by Osler, Welch, and others; Jacobi, _Medical Record_, N.Y., vol. XX, 1881, good; Israel, in _Ann. Rept. Smithson. Inst._, 1902. Leydig: Brief sketch in his Horæ Zoologicæ, 1902. Ramon y Cajal: Portrait in Tenth Anniversary of Clark University, 1899.

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