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