Newham's Rotary Principal Interest Demonstrator
||2E-2 handwritten in pencil inside back cover
||8623D handwritten in pencil inside back cover
overall: .25 x 9.5 x 9 1/2 in
Object consists of a circular slide rule-like interest demonstrator mounted inside a book cover. Included is a one page instruction sheet which is bound into the cover.
Gwen Bell artifact and book collection