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incandescent light bulb
lights up by heating a metal wire till it glows the wire is protected from air by a glass bulb thats filled with gas. this was invented by thomas edison. -
bessemer process
the process was used to make iron into steel by melting the ironand blowing air through the iron. the process is named after henry bessemer the person who invented it. -
alternating current
an electric charge that changes direction and that is in a way better than direct current and it was discovered by nikola tesla. -
barbwire
fencing wire with sharp points, normaly used for keeping in animals. the wire was once put on a a small long peice of board so cattle would leave the fences alone. the wire was invented by Michael Kelly. -
air brakes
breaks that were invented to from compressed air that made it safer for trains to stop it was invented by george westinghouse. -
Microphone
invented by Emile Berliner which converts sound into an electrical signal. today microphones are used in radios, phones, hearing aids, megaphones, televistions, and many other things. -
maxim gun
first self powered machine gun invented by Sir Hiram Maxim this gun was made to be easier to use then other guns that were already made. -
contact lens
thomas young was the inventer of the contacts which made it possible for people who had galsses to see with otu them. -
radio
the radio was invented by Nikola Tesla. the used radio waves and
at first was developed from wireless telegraphy. -
aspirin
invented by felix hoffman to help arthritis pain and headaches.it was also called acetylsalicylic acid.