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Meet the Texas Magnum, it appears to be the biggest slide rule in the world measuring in at 352 feet long, weighs 300 pounds and takes three men to slide… [via] – Link.

Related:
Slide rule guy – Link.

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Pictured here, the Nuclear bomb effects calculator (1962) and the Bristol Liquids SynchroValve Capity Calculator (1943) from Calculate This! by Robert Luhn. MAKE looks at slide rules. Info and article, page 50.