American-born British public official and physicist who conducted numerous experiments on heat and friction, concluding that heat is produced by moving particles.
, David 1770-1857.
Canadian explorer who followed the Columbia River to its mouth (1811) and mapped much of western Canada.
, Dorothy 1894-1961.
American journalist whose radio broadcasts and widely syndicated column “On the Record” (1936-1941) informed Americans of the impending threat of Nazi Germany.
, Sir John Sparrow David 1844-1894.
Canadian politician who served as prime minister (1892-1894).