-
4000 BCE
Waterwheel Lester Pelton
The waterwheel looks like a cool decoration in your front yard. They were used for crop irrigation, for grinding grains, and to supply drinking water to villages. The waterwheel was from 4000 B.C but didn't credit till the roman times -
Telephone / Telegraphy Alexander Graham Bell
is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be heard directly. -
Dynamite Alfred Nobel
Dynamite is an explosive made of nitroglycerin, sorbents and stabilizers. It was invented by the Swedish chemist and engineer Alfred Nobel in Geesthacht, and patented in 1867 -
Submarine John Phillip Holland
The Irish inventor John Philip Holland built a model submarine in 1876 and a full scale one in 1878, followed by a number of unsuccessful ones. -
Dissolvable Pills William Erastus Upjohn
The number of layers determined the strength of the pill.Up until 1884 medicine had to be taken in liquid form. -
Electric street car Frank Sprague
It was an easy way to get across the town and travel to near by city's or town -
Radio Guglielmo Marconi
Radio is the technology of using radio waves to carry information, such as sound and images -
Sound recording instruments Charles Tainter
Phonograph: an early sound-reproducing machine that used cylinders to record as well as reproduce sound.
