Arithmetical teaching aid, "A. Sonnenschein's Improved Arithmometer", in two boxes 1 (A and B) and 2, made by George Philip and Son, London and Liverpool.
A. Sonnenschein's improved Arithmometer' made by George Philip and Son of London and Liverpool, late 19th century. This device, which showed units, rods of 10s, and squares of 100s, anticipated many 20th century arithmetical teaching aids. Sonnenschein was an enlightened teacher and innovator who devised arithmetical aids and wrote textbooks for very young children.
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- Trevor Philip and Sons
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