55 (Ninth reprint with additional corrections of tenth original printing with corrections (December 1972) first ed.). Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables. Abramowitz, Milton Stegun, Irene Ann, eds.^ "Derivatives of Logarithmic Functions".Institutionum Analyticarum Pars Secunda de Calculo Infinitesimali Liber Secundus de Calculo Integrali (in Latin).
Introductio in Analysin Infinitorum (Part 2). ^ Euler, Leonhard Speiser, Andreas du Pasquier, Louis Gustave Brandt, Heinrich Trost, Ernst (1945).^ a b Hall, Arthur Graham Frink, Fred Goodrich (1909).For example, the logarithm of 120 is given by the following calculation: The integer part, called the characteristic, can be computed by simply counting how many places the decimal point must be moved, so that it is just to the right of the first significant digit. Tables of common logarithms typically listed the mantissa, to four or five decimal places or more, of each number in a range, e.g. Thus, log tables need only show the fractional part. The fractional part is known as the mantissa. An important property of base-10 logarithms, which makes them so useful in calculations, is that the logarithm of numbers greater than 1 that differ by a factor of a power of 10 all have the same fractional part.
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