Evening Republican, Volume 21, Number 204, Rensselaer, Jasper County, 13 September 1917 — Blind Man’s Fine Memory. [ARTICLE]

Blind Man’s Fine Memory.

In the later years of his' life the mathematician Euler was almost totally blind. Then, and probably earlier, he carried In bls memory a table of the first six powers at “series ot natural numbers up to 100.” It Is related that on one occasion two of his students‘"attempted to calculate a converging series. As they progressed they found disagreement in their results. These differed by a unit at the fiftieth figure. The question was referred to Euler, who deeded to make the calculation. He did this mentally, and his result was found to be correct.