Paul Alfred Weiss

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Paul Alfred Weiss
Paul Alfred Weiss.jpg
Weiss in 1963
Born (1898-03-21)March 21, 1898
Vienna, Austria
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New York, United States
Citizenship United States
Fields developmental biology
Institutions Vienna University of Technology
Biological Research Institute of the Vienna Academy of Sciences
Yale University
University of Chicago
Rockefeller University
Alma mater Technische Hochschule Wien (1922)
Doctoral advisor Hans Leo Przibram
Doctoral students Roger Sperry
Known for morphogenesis
developmental biology
Notable awards National Medal of Science (1979)

Paul Alfred Weiss (21 March 1898 – 8 September 1989) was an Austrian biologist who specialised in morphogenesis, development, differentiation and neurobiology. A teacher, experimenter and theorist, he made a lasting contribution to science in his lengthy career, throughout which he sought to encourage specialists in different fields to meet and share insights.


Paul Weiss was born in Vienna, the son of a Jewish couple, Carl S. Weiss, a businessman, and Rosalie Kohn Weiss. His background favoured music, poetry, and philosophy – Weiss himself was a violinist – but an uncle encouraged an interest in science. Weiss received his baccalaureate in 1916.

After the end of the First World War, having served for three years as an officer in the artillery, he commenced studies in mechanical engineering at the Technische Hochschule in Vienna, (now Vienna University of Technology). He then shifted his focus to biology with a minor in physics. He absorbed the studies of Edmond B. Wilson, Edwin G. Concklin, and Theodor Bovari and completed his doctoral thesis in 1922 under Hans Leo Przibram, then director of the Biological Research Institute of the Academy of Sciences in Vienna, on the responses of butterflies to light and gravity.

After completing his thesis he traveled widely in Europe, becoming an assistant director of the Biological Research Institute of the Vienna Academy of Sciences. In 1926 he married Maria Helen Blaschka.

His studies of limb regeneration in newts showed that a complete limb could regenerate even if particular tissue forms were removed from the stump: the required types of tissue would reform. He studied cell differentiation and the transplanting and reforming of connections in the nerves of limbs, using newts and frogs for his experiments. He went on to consider neurobiology and morphogenesis. He introduced the idea of the "natural experiment" – the quest for suggestive examples from nature – and this became a favourite teaching device.

In 1930 a prospective post at the University of Frankfurt was lost due to the depression and Weiss moved to the United States. In 1931, after studying developing cell cultures for some time, Weiss won a Sterling fellowship to work with Ross Granville Harrison at Yale. He took US citizenship in 1939, publishing his Principles of Development the same year.[1] From 1933 to 1954, after working briefly at Yale, he taught at the University of Chicago.

In his work on tissue cultures Weiss outlined several features of cell proliferation: he showed how cell-patterns are affected by their substrate and, through grafts, proved that basic neural patterns of coordination were self-differentiating rather than learned, though higher vertebrates can "retrain" reflexes.

During World War II he worked with the American government on nerve injury. In 1947 he was elected to the National Academy of Sciences. In 1954 he became one of the first professors at the new Rockefeller University in New York, where he remained for fifteen years. Paul Weiss was awarded the National Medal of Science by President Jimmy Carter in 1979. He died at White Plains, New York, on September 8, 1989, at the age of 91.[2]

See also


  • 1973: The Science of Life. The Living System – A System for Living, ISBN 0-87993-034-9


  1. P.A. Weiss, Principles of Development, Henry Holt and Company, 1939
  2. Jane Overton, Paul Alfred Weiss, Biographical Memoirs, National Academy of Sciences.

External links

  • Lua error in package.lua at line 80: module 'strict' not found.. (A longer version of the above.)