Harry K. dials up the Evening Telegraph Information Bureau, a pilot communications service in 1905 that provided Keystone Telephone customers with news and information at a moment’s notice

John Vidumsky discovers the people and the places behind the birth of electric light in America–at the heart of it the inimitable John Wanamaker and a brilliant inventor named Charles Brush whose power station, the first in Philadelphia, is still in use today

In honor of next Tuesday’s transit of Venus across the sun, we turn to Harry K’s Philadelphia Encyclopedia for some insight on David Rittenhouse, astronomer and polymath inventor and first American scientist to observe the transit, which he did on June 3, 1769