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Fuller Calculator Model 1
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Source: Nick Winter
Patented by George Fuller in 1878, the Fuller Calculator is a logarithmic calculator, capable of multiplication, division, roots, logarithms, and trigonometry. Most models were made from bakelite, an early plastic.
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Source: SlideRulerMuseum.com
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Source: Ebay
Fuller Calculator Model 1 (Top-Down Shot)
Fuller Calculator Manual
Also check out the Midget Circular Slide Rule.
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