10 Jun
2018
10 Jun
'18
9:02 p.m.
I wonder whether the only extant account of Schensted's device is in Gardner's files of correspondence.
Apparently Craige Eugene Schensted (later, "Ea Ea") and his wife Irene Verona published "The Two Dimensional Abacus" in 1974. Good luck finding a copy. I wonder if this is arose somehow from Jean Van Arsdel and Joanne Lasky's article "A two-dimensional abacus - the Papy Minicomputer" in The Arithmetic Teacher, October 1972: https://www.jstor.org/stable/41188061 Both Craige and Irene were born in 1927. Not sure what his status is but she died a few months ago.