Watt invented the steam engine because the lid of a pot of boiling water on the stove snapped and jumped up when it was boiling, and was inspired by it, because they found problems in their play and then solved them constantly, and then they became famous.
2. Levin Hook fiddled with the lens and the microscope.
Levin Hook is Dutch. He was born in a very poor family. When he was very young, his father died young because he had no money to treat the disease. When he was a child, he wandered around in order to make a living. 16 years old, working as an apprentice in the grocery store, one day 12 hours, exhausted every day. However, he is very ambitious and will never bow to the fate of suffering. He tried his best to learn knowledge and skills. Every night, in the dim light, I open the books borrowed from others and study hard.
The neighbor of this grocery store is an optical shop. Levin Hooke often saw people in optical shops grinding lenses, and he gradually became interested in lenses. As soon as he had time, he went to the optical shop to observe the polishing of lenses, and sometimes he tried to polish them, so he gradually mastered the technology of polishing lenses. At the same time, he also learned what kind of lenses can make people see things bigger and what kind of lenses can make people really see things in the distance.
Five or six years later, Levin Hook's grocery store closed down. Levin Hook lost his job and led a wandering life. Later, he found a job as a janitor in the city government, and his life was fairly stable. He is qualified to study again. On the one hand, I study my cultural knowledge hard, on the other hand, I polish my lenses carefully.
At this time, he had a wish, that is, to make an instrument that can magnify objects to observe small things that are invisible to the naked eye. It is certainly not easy to create such a tool. He grinds the needle bit by bit like a pestle with his own hands. Re-polishing after failure, I don't know how many times I failed, how many sleepless nights I spent, how many blood bubbles I grinded on my hands, and how many people laughed at me, but I finally succeeded, and a high-precision lens with completely qualified quality was successfully completed.
The successful production of the lens enabled Levin Hook to complete the most basic work of the instrument he envisioned. He happily installed this high-precision lens on a metal plate and installed a screw to adjust the lens. The world's first microscope was born.
Because of the great success of this instrument, Levin Hooke became the most outstanding figure in the history of microscope development. His success is attributed to his superb skill in grinding lenses (the lenses he grinds can be magnified 300 times) and his persistence in manufacturing microscopes. The advent of Levin Hooke's microscope opened the door of microbiology research and opened a new era of human conquest of infectious diseases.