It contains five-place tables of the common logarithms of numbers and of logarithms of sines, cosines, tangents and cotangents for every second of arc. There is also a shorter table of natural ...

THE publication of Mr. Dufton's method will, I think, serve a useful purpose. It is a common exercise in schools to plot on squared paper, numbers and their logarithms to the base 2 (see Blame's ...