Historical information
The logarithmic slide rule is a compact device for rapidly performing calculations with limited accuracy. The slide rule remained an essential tool in science and engineering and was widely used in business and industry until it was superseded by the portable electronic calculator late in the 20th century.
Physical description
Slide rule in a green case. On the back a small plaque: "Q.C. Binks-BSM 1939-1941.
Inscriptions & markings
Q.C. Binks-BSM 1939-1941