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Wilhelm Ludvig Johannsen (1857-1927)

Wilhelm Ludvig Johannsen studied plants and helped found the field of genetics, contributing methods and concepts to the study of heredity around the turn of the twentieth century in Denmark. His experiments on heredity and variation in plants influenced the methods and techniques of geneticists, and his distinction between the genotype of an organism-its hereditary disposition-and its phenotype-its observable characteristics-remains at the core of contemporary biology. Johannsen criticized biological explanations that relied on concepts such as vitalism and teleology.

Format: Articles

Subject: People

Edward Stuart Russell (1887-1954)

Edward Stuart Russell was born 23 March 1887 to Helen Cockburn Young and the Reverend John N. Russell in Port Glasgow, Scotland. Friends and co-workers alike knew Russell as a quiet and focused, though always kind and helpful person. Trained in classics and biology, Russell's interests drew him to the study of historical and philosophical issues in the biological sciences, particularly morphology and animal behavior. According to Nils Roll-Hansen, Russell was one of the most influential philosophers of biology in the second third of the twentieth century.

Format: Articles

Subject: People

H. E. Woodward

Format: Photographs

Subject: People

F. C. Waite

Format: Photographs

Subject: People

L. A. Phelps

Format: Photographs

Subject: People

L. Hoadley

Format: Photographs

Subject: People

G. T. Popa

Format: Photographs

Subject: People

C. V. Taylor

Format: Photographs

Subject: People

H. Knower

Format: Photographs

Subject: People

Dixie Pelluet

Format: Photographs

Subject: People

August Krogh

Format: Photographs

Subject: People

W. E. Garry

Format: Photographs

Subject: People

Jack Cattell

Format: Photographs

Subject: People