Search Loci: Convergence:
Every mathematician worthy of the name has experienced ... the state of lucid exaltation in which one thought succeeds another as if miraculously ... This feeling may last for hours at a time, even for days. Once you have experienced it, you are eager to repeat it but unable to do it at will, unless perhaps by dogged work ....
The Apprenticeship of a Mathematician.
A Counting Board in a Strasbourg Museum
Have you ever seen a counting table? The question occurred to me when I came across a very fine example in Strasbourg and wondered why I had never seen one before in any museum in Europe.
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Counting boards used in colonial Jamestowne, VA
I saw a drawing of a counting board at Jamestowne, VA. It mentioned that Jettsons were used to track the transactions. Further stated that Arabic numerals were in very limited use at that time.