MAGNETIC ROCKS
Previous observations, 361.—Magnetic Polarity usually caused by
atmospheric electricity, 362.—Displayed by both acid and basic rocks,
364.—Very frequent in Vanua Levu, 365.—Its relation to specific
weight, 366.—The influence of locality, 367.—Frequently observed in
mountain peaks, 367.—Description of the peaks, 368.—Measurement of the
polarity of rocks, 370
_Pages_ 361-371