Natural History (Pliny) developed for counterfeit coins and proved very popular with the victims, mostly ordinary people. He deals with the liquid metal mercury, also found in silver mines. He records that it is toxic, and amalgamates with gold, so is used for refining and extracting that metal. He says mercury is used for gilding copper, while antimony is found in silver mines and is used as an eyebrow cosmetic. The main ore of mercury is cinnabar, long used as a pigment by painters. He says that the colour is similar to "scolecium", probably the kermes insect. The dust is very toxic, so
The K-Metal from Krypton copies of the missing pages that they can find, and aim to replace any redrawn pages with restorations of originals if available. The K-Metal from Krypton "The K-Metal from Krypton" is an unpublished Superman story written by Jerry Siegel in 1940 and originally illustrated by the Joe Shuster Studio. The reason why National Comics (later to become DC Comics) never published the story is not known. This storyline features the precursor to Kryptonite called "K-Metal" and Lois learning that Clark Kent is Superman. Like all Superman stories of the 1940s, the adventure originally had no title. The earliest known occurrence