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Page 5 of Paul Halmos Photograph Collection: Paul Bateman, Felice Bateman, Edward Begle, Alexandra Bellow, William Johnson, Georgia Benkart, Lipman Bers
A reprint of the 32nd yearbook of the NCTM, dealing with developments in mathematics education in the U.S. and Canada. In particular, it gives a history of the various reform movements up to the publication date of 1980.
A water tub holds 73 gallons; the pipe which fills it usually admits 7 gallons in 5 minutes; and the tap discharges 20 gallons in 17 minutes.
This is the title page of the geometry book of Jacob Kobel (1460 - 1533). The book dealt primarily with measurement, showing its readers how to use various instruments to measure fields, determine heights of buildings, and perform various other necessary tasks.
The symposium this year will discuss Gauss's Disquisitiones Arithmeticae.

An introduction to the prime numbers in many of their aspects.

A certain man had in his trade four weights with which he could weigh integral pounds from one up to 40. How many pounds was each weight?
A dramatization, in two Acts, of the struggles of European mathematicians of the seventeenth and eighteenth centuries to come to terms with the newly admitted negative numbers.
History of Maya calendars, including the modified base 20 number system used in them
Of the two water reeds, the one grows 3 feet and the other 1 foot on the first day. The growth of the first becomes every day half of that of the preceding day, while the other grows twice as much as on the day before.