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Tide Predicting Machine No. 2 ("Old Brass Brains")
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Tide Predicting Machine No. 2 ("Old Brass Brains")
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Face of Tide Predicting Machine No. 2
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Dials on Tide Predicting Machine No. 2
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Two Sections of Tide Predicting Machine No. 2
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NOAA's Tide Predicting Machine No. 2
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Tide Formula Component Cranks on Tide Predicting Machine No. 2
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Mechanically Adding Trigonometric Functions
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Looking into the Top of Tide Predicting Machine No. 2
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Summation Chain
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Gears on Tide Predicting Machine No. 2
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Summation Chain Close-Up
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A Tide Formula Component Crank on Tide Predicting Machine No. 2
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Mechanically Adding Trigonometric Functions
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Gears on Tide Predicting Machine No. 2