Tubular Slide Rule
Wall Art and Photo Gifts from Mary Evans Picture Library
Tubular Slide Rule
OTIS KING TUBULAR SLIDE RULE a mechanical calculating devise using addition & subtraction of logarithms to simplify division and multiplication Date: circa 1960
Media ID 14285784
© Mary Evans Picture Library/PHILIP TALMAGE
1960 Addition Calculating Calculators Cylindrical Devise Division Instruments Measurement Mechanical Multiplication Otis Rule Scientific Tubular
MADE IN THE UK
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