[10 things you don’t know]
1. If you accidentally stab yourself with a pencil, you won’t get lead poisoning, because the pencil doesn’t contain lead, it’s clay and graphite. Of course, if you stab someone, you may be sued for intentional injury
2. Here’s a story about Watergate for people who like to review history and gossip: Gordon Lindy has such a description in his autobiography. When he comes to the office and sees John Dean, the sharpened pencil on the desk makes an idea flash through his mind and stab him to death（ In Watergate, Dean was a traitor to Lindy.)
3. Graphite, a carbon crystal discovered in coswick, England in the 16th century, was named after A. g. Werner in the 18th century. It comes from the Greek graphein, which means “writing”
4. Pencil, on the other hand, comes from the Latin word penicillus. Although it is not so relevant, penicillus means little tail.
5. When a pencil is used to write, it is basically the result of its debris stuck in the fiber of the paper. His debris is not big, one thousandth of an inch.
6. Is leisure hard? It is said that the average pen can draw 35 miles of lines, or write 45000 words (in Western Language). Has anyone ever tested it? History shows No. Comrades! The first chance in the world!!
7. As early as the first century AD, the Greek poet Philip of Thessalon í Ki used a lead writing tool to write. However, the contemporary pencil was recorded by Swiss naturalist Conrad gersner in 1565 (when he died)
8. The French are the living parents of pencils (yes, without them, maybe the world is using brushes): in 1795, Nicolas Jacques cont é The production process of clay graphite composite material was invented. In 1828, Bernard lassimone invented the pencil sharpener. In 1847, Terry des estwaux invented the mechanical pencil sharpener.
9. The French (you again Caoutchouc (a plant secreted glue, said to be a combination of Spanish caucho and Tupi’s cauucha) was also made into rubber, so that the misspelled words were finally wiped away without bread crumbs.
10. Basically, pencils sold in the United States all have a rubber head, while pencils sold in Europe do not（ Do Europeans make fewer mistakes?)