Accession Number: 1994.14.10
Description: This abacus prototype is made of a piece of aluminum that is arched. The top and bottom edges rest on any flat surface. The arch has grooved horizontal rows so that small metal counters, which move on plastic wire rods, rest in the grooves as they are placed. There are seven columns with 1 counter each.
Height: 2.2
Width: 3
Depth: 0.5
Date Made: ca. 1962
Place of Origin: Pennsylvania
Collection: Gissoni Abacus Collection
History/Provenance: Gissoni Abacus Collection
Credit Line: Gift of Fred Gissoni, 1994.14
Subjects: Abacus Mathematical instruments Prototypes
Material: Aluminum, plastic
Updated: 03/22/2011
