R./6.20/33-36
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Item
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1832-1855, [18--]
Part of Manuscripts in Wren Class R
Notes, memoranda and charts relating to tides, with tide tables, in a variety of hands. Includes a printed table, "Depths of Water on Sunderland Bar in June, 1846", a statement relating to a grant from the British Association, 1837-1838 and a draft "Description of an Instrument for Measuring the Velocity of Ships, Currents &c" by James R. Napier, 15 May 1855.