After the Great Fire of London in 1666, Robert Hooke, an English scientist and architect, developed the double-hung sash window, using counterweights to operate and keep the window open. This also allowed people to use the window as a fire escape.
After the Great Fire of London in 1666, Robert Hooke, an English scientist and architect, developed the double-hung sash window, using counterweights to operate and keep the window open. This also allowed people to use the window as a fire escape.