Imperial Collection of Mathematical Essentials, Vol. 3

Volume 56 57

This table contains common logarithms (base 10) for the integers 21,501 through 21,600. In historical tables of this era, the integer part of the logarithm (the characteristic) is omitted to save space. For these five-digit numbers, the characteristic would be 4. To read the value for 21551, for example, the entry "43334674269" represents the decimal part (the mantissa) .43334674269. Thus, log(21551) ≈ 4.43334674269.