Iron casting
The waterwheel.
need and invention
The high-rise building was made feasible by two things- the low cost availability of structural steel framing, and the invention of the elevator. Without elevators, no one is going to want to live or work on the 35th floor of a building.
the invention that led up to the gas mask was a cloth in front of your face
the invention of the machine gun.
The Invention of the Telegraph by Joseph Henry in 1831 led to the invention of the phone.
CD's
The hydrophone :)
The Walkman led to the invention of the iPod.
The invention of steel led to increased production by steam powered and electrical machines. This technology advanced quickly during the American Industrial Revolution.
The latest invention of the 1800's STEEL! The latest invention of the 1800's STEEL!
because it is.
The steam engine
Steel.
The invention of the elevator and the invention of steel.
A caveman.
The Wright brothers' invention of the airplane led to advancements in air transportation.