/kloc-a venetian businessman in the 0/5th century often went out to do business, but he was worried that his wife would go out to have an affair. One rainy day, he was walking in the street, with a lot of mud on his heels, and he walked very hard. Businessmen are inspired by this, because Venice is a water city and boats are the main means of transportation. The businessman thinks that his wife will not be able to walk on the springboard in high heels, so she can be trapped at home.
Unexpectedly, his wife felt very novel when she put on these shoes. Accompanied by the servant, she got on and off the boat and played around. High-heeled shoes made her more graceful, and fashionable ladies rushed to follow suit, so high-heeled shoes quickly became popular.
Second, raincoats.
1747, French engineer Franois Fraineau made the world's earliest raincoat.
He used latex obtained from rubber wood to dip cloth shoes and jackets in this latex solution, which can play a waterproof role.
McIntosh, who works in a rubber factory in Scotland, can't afford rain gear because he lives in poverty. Every rainy day, he can only go to work in the rain. One day, he accidentally spilled rubber juice on his clothes and couldn't wipe it off, so he had to wear this dirty clothes to go home.
It was raining outside, but when McIntosh came home, he was surprised to find that his clothes were not wet at all. He just smeared rubber juice on his clothes. This is the first rubber raincoat in the world.
Third, the phonograph
Edison was a famous American scientist and inventor. Because he has many inventions 1000, such as electric light, phonograph, film and storage battery, people call him "the king of inventions" and "the magician".
Edison's greatest achievement was the invention of the electric light. However, among his inventions, nothing shocked the society at that time more than the phonograph. /kloc-in the autumn of 0/877, the phonograph invented by Edison caused a sensation throughout new york, and reporters from various newspapers flocked to report this unusual news.
Fourth, the telephone.
That was June 2nd, 1875. Bell and his assistant Watson are experimenting with multiple telegrams in two rooms respectively. An accidental accident inspired Bell. In Watson's room, there is a spring stuck to the magnet of the telegraph. When Watson pulled it away, it shook.
At the same time, Bell was surprised to find that the spring on the telegraph in his room vibrated and made a sound. It is the current that transmits vibration from one room to another.
Bell's mind suddenly broadened. He thought: If a person speaks to a piece of iron, the sound will cause the iron to vibrate; If an electromagnet is placed behind the iron sheet, the vibration of the iron sheet will inevitably produce large and small currents in the electromagnet coil. This fluctuating current travels far away along the wire, so that similar devices in the distance will not vibrate and make the same sound.
Bell and Watson made the telephone according to this new idea. In an experiment, a drop of sulfuric acid splashed on Bell's leg, which made him cry. "Mr. Watson, I need you. Please come to me! " "This sentence is the phone through the wire to Watson's ear, the phone succeeded! 1On March 7th, 876, Bell became the patentee of telephone invention.
Five, lightning rod
The modern lightning rod was invented by American scientist Franklin. Franklin thought lightning was a discharge phenomenon. In order to prove this point, he risked being struck by lightning on a thunderstorm day in July 1752, put a kite with a long metal wire into the thunderstorm cloud and tied a string of silver keys at the end of the metal wire.
When the thunder and lightning happened, Franklin's hand was close to the key, and a string of electric sparks burst out on the key. My hands are still numb. Fortunately, the lightning passed down this time was very weak, and Franklin was not injured.