# Convergence articles

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Two excellent volumes on Euler in honor of his three hundredth birthday
A ladder is placed perpendicular to the plane of the horizon, and in coincidence with the plane of an upright wall.
This is the title page of Isaac Barrow's Latin edition of the works of Archimedes, the first four books of Apollonius's Conics, and Theodosius's Spherica. It was published in 1675.
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...
A teacher agreed to teach 9 months for $562.50 and his board. At the end of the term, on account of two months absence caused by sickness, he received only$409.50. What was his board worth per month?
Archimedes' work, The Method, explained, along with many other important ideas of the great Greek geometer.
Benjamin Banneker solved some trigonometry problems in his extant notebooks. One of them is discussed here. The authors have also discovered the probable source of Banneker's trigonometry table.
What will the diameter of a sphere be, when its volume and surface area are expressed by the same number?
A comprehensive history of trigonometry from ancient times to the Renaissance.
Request from the editors.