Artifact Details Title Planimeter Catalog Number 102712290 Type Still Image Description Black and white image : Planimeter. Verso: Planimeter, Fall 1984, #10 - Calculators" Date 1984 ca. Identifying Numbers Other number #1976 Verso Dimensions overall: 8 in x 10 in Category Identification photograph Credit Courtesy of Gwen Bell Lot Number X7413.2015