1992.82

Cubarithm type slate and cubes

Cubarithm slate has brown plastic frame with 15 cells vertically and 20 horizontally for a total of 300; eighty-seven (87) 3/8" square brown plastic cubes are placed in the squares of the frame; cubes have raised braille dots forming the numerals 0-9 on five of the sides; four raised circular feet on base.

H-10 W-7.5 D-0.5 inches

ca. 1977

Royal National Institute for the Blind

England

APH Collection

The Cubarithm was originally introduced by Alphonse Oury in France in 1886. This is a British variation, introduced in 1977, and very similar to the Brannan Cubarithm Slate. Robert E. Brannan developed his arithmetic slate design in the 1920s for his son, a blind student in the Evanston, IL public schools. A sales flyer, circa 1931, offered the slate and 100 cubes directly from Brannan in Evanston for $4.25. His original designs used Bakelite rather than the hard rubber used at APH when the company began manufacturing the Brannan slate in 1958.

APH Collection, 1992.82