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Convergence articles

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Show that the curves x2 - y2 = a2 and 2 xy = b2 cross at right angles.
A wonderful survey of the history of mathematics, emphasizing its relationship with the ambient culture.
Now a good horse and an inferior horse set out from Chang'an to Qi. Qi is 3000 li from Chang'an.
Howard Eves' sixth edition is still worth considering for a textbook.
A compilation of ethnomathematical ideas from around the world.

The copybooks of two young men reveal very different purposes in learning geometry.

An analysis of James Gregory's proof of the Pappus-Guldin theorem, along with the original documents both in Latin and English.
The steamer, Katie, leaves the wharf at New Orleans and runs an average speed of 15 mph. When Katie had gone 25 miles, the steamer R.E. Lee leaves the wharf and runs the average speed of 18 mph. How far will the Lee go before she overtakes the Katie?
A farmer sold a team of horses for $440, but did not receive his pay for them until 1 yr, 8 mo after the sale. He had at the same time another offer of $410 for them. Did he gain or lose by the sale and by how much, money being worth 6%/yr?
The beginnings of land measurement in the early United States and how this affected American democracy.

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