On this day, 158 years ago, August 25, 1867 (July 26, 1867 in the lunar calendar), British physicist and chemist Faraday passed away. In 1791, Faraday was born in the home of a poor blacksmith in the suburbs of London. His father had a poor income, was often sick, and had many children, so when Faraday was a child, he could not even eat enough food. Sometimes he could only eat a loaf of bread a week, let alone go to school. When Faraday was 12 years old, he went to the streets to sell newspapers. Selling newspapers while reading from newspapers. By the age of 13, Faraday entered a printing factory as an apprentice bookbinding. He bound books while studying. Every time he has spare time, he will flip through bound books. Sometimes even on the delivery road, he would watch while walking. After several years of hard work, Faraday finally took off the label of illiteracy. Gradually, Faraday could understand more and more books. He began reading the Encyclopedia Britannica and often read it late into the night. He particularly likes books on electricity and mechanics. Faraday had no money to buy books or books, so he used waste paper from the printing house to make notebooks, extract various materials, and sometimes add illustrations himself. By chance, Danes, a member of the Royal Society, came to the printing house to proofread his work and accidentally discovered Faraday's "manuscript". When he learned that it was a note taken by a binding apprentice, he was surprised, so Danes gave it to the Royal Academy of Faraday. Faraday came to the Royal Academy with great excitement to listen. The person who gave the report was David, a well-known British chemist at that time. Faraday widened his eyes and listened attentively to David's lecture. After returning home, he compiled his listening notes into a book and used them as a "Chemistry Textbook" for self-study. Later, Faraday sent his carefully bound Chemistry Textbook to Professor David, with a letter stating: "I would like to escape from the business world and enter the scientific world, because according to my imagination, science can make people noble and amiable." After receiving the letter, David was deeply moved. He admired Faraday's talents very much and decided to hire him as an assistant. Faraday was very diligent and quickly mastered experimental techniques and became David's right-hand assistant. Half a year later, David will take a scientific research trip to the European continent, visit famous scientists from various European countries and visit chemical laboratories in various countries. David decided to take Faraday abroad. In this way, Faraday traveled with David in Europe for a year and a half, met with famous scientists such as Ampere, gained a lot of knowledge, and learned French. After returning to China, Faraday began to conduct independent scientific research. Soon after, he discovered the phenomenon of electromagnetic induction. In 1834, he discovered the law of electrolysis, which shocked the scientific community. This law is named "Faraday's Law of Electrolysis". Faraday relied on hard self-study to become the world's top scientists from a bookbinding apprentice who had not even attended primary school. Engels once praised Faraday as "by far the greatest electrician." On August 25, 1867, Faraday passed away while sitting in his study reading. He was 76 years old. Due to his great contribution to electrochemistry, people used his surname,"Faraday", as the unit of electricity; the abbreviation of his surname,"Farah", as the unit of capacitance.