From George H. Darwin's article "Tides" in the 9th
edition of the Encyclopaedia Britannica. Note that in this
graph, time increases to the left.
This figure shows the tidal record for two weeks
(January 1-14, 1884) at Bombay. The tide was recorded on a
cylindrical sheet that turned once every 24 hours. Each daily
curve is labelled with its date. Some obvious features: