John Draper, born in 1811, chemist, pioneer in photochemistry, discovered the “Draper point” all substances at about 525 C glow a dull red. He was the first to produce photomicrographs. He died in 1882 at age 71. Ok this is what you do. Get out a torch of some sort and light it. Hold a bobby pin in the flame until it turns red, when that happens it will be 525 degrees Celsius. That is the Draper Point.