William Jenney
The skyscraper
The invention of the elevator and the invention of steel.
The invention of the elevator and the invention of steel
You can be sure if one Jumps/falls there is a life changing experience.
American architect William Le Baron Jenney is credited with the invention of the skyscraper. In 1885, he designed the ten-story Home Insurance Building on the corner of La Salle and Monroe streets in Chicago.
the invention of the printing press
It was the invention and usage of a zero symbol
it helped it a lot
They both contributed to the invention of the skyscraper, which really transformed cities.
the transition from stone to steel framing. Sone was just too heavy, and the foundation would start looking like the great pyramids.
(1) Steel and (2) the Elevator. Those are the most significant.
electron microscope