Analysis:
He was arrested by the London authorities for inciting riots on 1770, and then put into the notorious Xinmen prison. Unlike most prisoners, he is good at thinking with his own brain. One morning, he was brushing his teeth with a small cloth in the usual way, and suddenly an idea came to his mind: Is it more convenient and effective to brush your teeth with a small brush than to wipe your teeth with a cloth? While eating, he secretly put a meat bone in his pocket, took it back to his cell and asked a friendly guard for some bristles. That night, he ground the bone into a thin stick, drilled some small holes in it, and then tied the bristles into small holes and trimmed them neatly. In this way, the world's first toothbrush was born in prison! After she got out of prison, Alice started her own toothbrush factory. He has achieved great success because people prefer to use toothbrushes instead of small pieces of cloth. Westerners have been brushing their teeth with tooth powder for more than 100 years since Alice invented the toothbrush. They first dipped some tooth powder in a small porcelain jar with a toothbrush and put it in their mouths. Although the invention and use of tooth powder have improved a lot, Washington Sheffield, a dentist in Connecticut, USA, thinks this method of brushing teeth is not hygienic enough. He saw that some food had been packed in metal hoses and only needed to be squeezed gently, so he decided to make a tube of toothpaste instead of the original canned tooth powder. 1892, when the brand tube toothpaste of Dr. Sheffield came out, it was a great success. Later, Washington Sheffield invented many metal hose products.