EXPERIMENT XII.
TO prove that some Bodies, not usually class'd amongst Magnetical ones, have neverthe∣less Magnetical Qualities, I shall subjoyn; That a Brick being divided into two oblong pieces,
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TO prove that some Bodies, not usually class'd amongst Magnetical ones, have neverthe∣less Magnetical Qualities, I shall subjoyn; That a Brick being divided into two oblong pieces,
and heated in the Fire, acquir'd a Verticity by cooling North and South, it's Southward End be∣ing in some measure able to draw the North Point of a Mariner's Needle, which the other End of the Brick would drive away.