Talc Talc Talc or talcum is a clay mineral composed of hydrated magnesium silicate with the chemical formula HMg(SiO) or MgSiO(OH). In loose form, it is (in ratio with or without corn starch) one of the most widely used substances known as baby powder. It occurs as foliated to fibrous masses, and in an exceptionally rare crystal form. It has a perfect basal cleavage, and the folia are not elastic, although slightly flexible. The Mohs scale of mineral hardness, based on scratch hardness comparison, defines value 1 as the hardness of talc. Talc can easily be scratched by a fingernail. Talc
Mayo Mohs Mayo Mohs Mayo A. Mohs (March 23, 1934 – August 22, 1996) was the editor of the 1971 science fiction anthology "Other Worlds, Other Gods: Adventures in Religious Science Fiction" (Doubleday & Company, 1971, Library of Congress Catalog Card Number 76-144282.) Per the jacket of that book, "Mayo Mohs is religion editor of "Time" magazine and a long-time science fiction buff. The idea for this collection was originally inspired by an article he wrote for "Time" on theology and science fiction. A native of St. Paul, Minnesota, Mr. Mohs has been a history teacher and a reporter for the "Cincinnati