(Encyclopedia) Hall effect, experiment that shows the sign of the charge carriers in a conductor. In 1879 E. H. Hall discovered that when he placed a metal strip carrying a current in a magnetic…
(Encyclopedia) Oberth, Hermann Julius, 1894–1989, Austro-German astronautical pioneer, b. Hermannstadt, Austria-Hungary (now Sibiu, Romania). Beginning his studies in astronautics before World War I…
(Encyclopedia) Tristram and IsoldeTristram and Isoldetrĭsˈtrəm, ĭsōlˈdə, ĭzōlˈ– [key], medieval romance. The earliest extant version (incomplete) was written (c.1185) by Thomas of Britain in Anglo-…
(Encyclopedia) Siebold, Philipp Franz vanSiebold, Philipp Franz vanfēˈlĭp fränts fen zēˈbôlt [key], 1796–1866, German naturalist and physician; son of A. E. von Siebold. He was noted for his studies…
