Practical, Short, and Direct Method of Calculating the Logarithm of Any Given Number, and the Number Corresponding to Any Given Logarithm

Excerpt from Practical, Short, and Direct Method of Calculating the Logarithm of Any Given Number, and the Number Corresponding to Any Given Logarithm Logarithms is as powerful an agent in calculation as steam is in mechanics; with this truth before us, it is strange that few know their proper use, or how they are computed. The most profound mathematician, or the most experienced calculator, has been hitherto unable, simply and directly, to compute in any reasonable time, the logarithm of a number taken at pleasure, or the number correspond ing to a given logarithm to any required extent; for instance, if the logarithm of 36525636516 be required to fifteen places of decimals.