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10 Unsuccessful Victorian-era Inventions From Both Sides of the Atlantic

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  • 10 Unsuccessful Victorian-era Inventions From Both Sides of the Atlantic

    http://www.urbanghostsmedia.com/2015...an-inventions/



    Hard labour cranks could also be made harder or easier to operate, depending on how tightly they were assembled. Guards could adjust them as they saw fit, giving rise to the enduring nickname ‘screws’.
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