Liquid Paper Liquid Paper Liquid Paper is an American brand of the Newell Brands company marketed international that sells correction fluid, correction pens, and correction tape. Mainly used to correct typewriting in the past, correction products now mostly cover handwriting mistakes. In 1956, Bette Nesmith Graham, the mother of The Monkees' Michael Nesmith, invented the first correction fluid in her kitchen. Working as a typist, she used to make many mistakes and always strived for a way to correct them. Starting on a basis of tempera paint she mixed with a common kitchen blender, she called the outcome fluid "Mistake Out" and
History of fluid mechanics statics, Biruni discovered that there is a correlation between the specific gravity of an object and the volume of water it displaces. He also introduced the method of checking tests during experiments and measured the weights of various liquids. He also recorded the differences in weight between freshwater and saline water, and between hot water and cold water. During his experiments on fluid mechanics, Biruni invented the conical measure, in order to find the ratio between the weight of a substance in air and the weight of water displaced. Al-Khazini, in "The Book of the Balance of Wisdom" (1121), invented