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The Roaring 20s- Inventions
Transcript of The Roaring 20s- Inventions
(Lie detector) Alexander Fleming working on the anti-biotic Penicillin A model of a 1920s lie detector -Discovered in 1928
-Took scientist more than a decade to understand how to use it
-Discovered by Alexander Fleming- a Scottish biologist
-Alexander Fleming treated wounded soldiers in WW1 -Penicillin was used to treat wounds so they wouldn't get infected Importance -Less people suffered from their wound infection This anti-biotic helped people live longer and bear or not feel the pain at all of an infection. <--- A traffic signal in the 1920's The vacuum cleaner was invented by Hubert Cecil Booth. He worked as a carpet duster and wanted to make an invention to help make the job easier because carpet dusters developed coughing fits and asthma. The traffic signal was invented in 1923 by Garrett A. Morgan. Traffic signals The Band-Aid was invented by Earle Dickson. He was a worker of the company Johnson & Johnson. Band-Aid Lie detector The lie detector was invented in 1921 by John Augustus Larson, a medical student at the University of California at Berkeley. Reason The traffic signal was invented to reduce the amount of accidents and policeman used to control traffic after the invention of cars got the streets busier. Reason Earle Dickson's wife Josephine was accident prone. She would always cut herself with the kitchen knife. Earle one day got an idea to help her wife. He cut a piece of tape into a strip and stuck a little square piece of gauze in the middle of it and created the band-aid for his wife to put on her cuts. When Earle's company Johnson & Johnson heard his new invention could be put on quickly, they decided to make them.