The Inventors

Who Invented?

👉🏽 Skyscraper, 1882. Inventor : William Le Baron Jenney (U.S.). Home Insurance Co. Building, Chicago, Illinois, 10-storey (top 4 steel beams).

👉🏽 Slide Rule, 1621. Inventor : William Oughtred (England) (1575-1660). Earliest slide between fixed stock by Robert Bissaker, 1654.

👉🏽 Spectacles (or Eyeglasses), c. 1286. Inventor : Venice, Italy (convex). Concave lens myopia not developed till c. 1450.

👉🏽 Spinning Frame, 1769. Inventor : Sir Richard Arkwright (England) (1732-92).