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Nine Pin Rock, Trinidad. Page 24.
CHAPTER I.
Leave Chatham.—Experiments at Gillingham.—Margate Roads.—Departure from the Lizard.—Height of Waves.—Bay of Biscay.—Madeira.—Pico Ruivo.—Phenomenon.—Tea Plantation.—Touch at Santa Cruz.—Port Praya.—Quail Island.—Observations.—Enter the Variables.—Plane of Vapour.—St. Paul's Rocks.—Geological Remarks.—Cross the Equator.—Magnetic Equator.—Rapid Change of Dip.—Point of least Intensity.—Island of Trinidad.—Local Magnetic Influence.
