Mildred Dunnock of roles in Broadway productions during the 1930s, Dunnock won praise for her performance as a Welsh school teacher in "The Corn is Green" in 1940. The 1945 film version marked her screen debut. During the 1940s she performed mainly on stage, in such dramas as "Another Part of the Forest" (1946) and "Death of a Salesman" (1949) and in the musical "Lute Song" (1946). In 1947, Dunnock became a founding member of the Actors Studio. Dunnock reprised her "Salesman" role in the 1951 film version. She originated the role of Big Mama in the Tennessee Williams' "Cat on a
Golding Bird classified by the chemistry of the nucleus, but determined that they all fell within two overall groups: organic stones caused by a misfunctioning bodily process, and excessive inorganic salts causing sediment on which the stone could nucleate. In 1842, Bird became the first to describe oxaluria, sometimes called Bird's disease, which is caused by an excess of oxalate of lime in the urine. This is the second most common cause of kidney stones, the first being uric acid and its ammonium salt. There are several others, such as ammonium oxalate. In his great work "Urinary Deposits", Bird devotes much space