Dremel 543 and EZ544 are both carbide cutting wheels for cutting and shaping on woods, fiberglass, plastics and laminates. Do not use them on metals. For 543 the mandrel is included; for EZ544 use the EZ402 Mandrel.
After Domagk published his findings in 1935, doctors found that Prontosil could control many bacterial infections. Subsequently, other researchers developed derivatives based on the Prontosil sulfonamide group. The resulting so-called sulfa drugs revolutionized medicine and saved many thousands of lives.
According to the official company history, even longer. The soft drink was not invented by a doctor named Pepper (more on that below). Dr Pepper was invented in 1885 by a pharmacist named Charles Alderton, in Morrison's Old Corner Drug Store in Waco Texas, in those days nicknamed six-shooter junction.. Like many drug stores in those days, Morrison's, which was always hopping, featured a soda fountain.