In 1845, Rufus Porter—an eccentric inventor, painter, and editor—published the first issue of Scientific American, a weekly newspaper about new inventions. By 1853, its circulation had reached 30,000 and it was reporting on various sciences, such as astronomy and medicine. In 1921, it became a monthly. Its solidly-researched, well-written articles, accompanied by illustrations and explanations, have made it a highly regarded publication. How much did the first subscriptions cost? Discuss
Source: The Free Dictionary