Friedrich Mohs harder. This became the basis of the hardness scale developed by Mohs. The hardest mineral, diamond was given a value of 10 and softer minerals such as talc were given the very low value of 1 (unity). Other minerals were given intermediate values, depending on their ability to scratch another mineral in the scale. Thus gypsum was given the value 2 because it will scratch talc crystals, and calcite the value 3 because it will scratch gypsum. Minerals are also now classified by chemical characteristics, but the physical properties are still useful in field examination. In 1812, Mohs became a
Mohs surgery currently performing frozen section histology would realize how simple the technique is. It is better than performing serial bread loafing at a 0.1 mm interval for improved false negative error rate simply in requiring less time, less tissue handling, and fewer glass slides mounted. Once mounted as tangential or horizontal sections, the pathologist simply has to relearn how to visualize skin structure on a tangential to horizontal view. In the absence of a Mohs-trained pathologist, peripheral sectioning followed by horizontal sectioning of the remaining center is similar, but not exactly the same as, the Mohs method. The clinical quotes for