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This is page 167 from the Exercitationes mathematicae (1657) of Frans van Schooten (1615-1660). This book contained a collection of mathematical construction problems, among much else. It was one of the books read by Isaac Newton while he was a student at Cambridge University and helped to introduce him to modern mathematics. On this page we see a construction enabling one to find the distance across a river.

Convergence Advisory Board 2004-2009

Two excellent volumes on Euler in honor of his three hundredth birthday
Given four numbers whose sum is 9900; the second exceeds the first by 1/7 of the first...
A person has a circular yard that is 150 ft. in diameter, and wishes a walk of equal width made round it within the fence...
Now a good horse and an inferior horse set out from Chang'an to Qi. Qi is 3000 li from Chang'an.

A bibliographical reference to mathematics books printed in the new world before 1700.

Collection of historical articles that appeared in Consortium, the newsletter of COMAP.
What will the diameter of a sphere be, when its volume and surface area are expressed by the same number?
If two Post-boys, A and B at 59 miles distance from one another, set out in the morning in order to meet...