Logarithms are a common idea today, even though we don’t use them as often as we used to. After all, one of the major uses of logarithms is to simplify computations, and computers do that just ...

Discover what a log-normal distribution is, its financial applications, and how to calculate it, including using Excel for practical financial analysis.

Automatic Arithmetic: a New System for Multiplication and Division without Mental Labour and without the Use of Logarithms. By John Sawyer, Public Accountant. (London: George Bell and Sons, 1878.) ...