This work has been prepared with a view to the needs of those who are giving instruction or supervising the work in arithmetic in the elementary schools.

This little work was published about ten years ago as a chapter in Merriman and Woodward's Higher Mathematics.

This little work was published as a chapter in Merriman and Woodward's Higher Mathematics.

The writings of Newton, Leibniz, Pascal, Riemann, Bernoulli, and others in a comprehensive selection of 125 treatises dating from the Renaissance to the late 19th century — most unavailable elsewhere.