Logarithms celebrate their 400th birthday Four centuries ago, John Napier provided human calculators a faster way to multiply ...

In the first part of this work logarithms of seven or more decimal places are necessary, but in the second part, which is generally by far the most laborious, logarithms of four and five decimals ...

PART IV. of this monumental work, the third to be published, gives the logarithms of numbers between 40,000 and 50,000. These were obtained by adding the logarithm of 0.5 to the logarithms of all ...