Examples
“He hung a bar-magnet on a pivot in its center as a compass-needle is hung.”
“Magnetic Needles and Compasses_ consist chiefly of a short bar-magnet.”
“_The electro-vital fluid_, in the animal economy, is subject to the same principles of polarization as the magnetic current from the artificial machine, or the magnetism of the bar-magnet.”
“In the loop place a darning-needle, and bring the two ends or poles, as they are called, of your bar-magnet successively up to the ends of the needle.”
“Go, then, to a philosophical instrument maker, and give a shilling or half a crown for a straight bar-magnet, or, if you can afford it, purchase a pair of them; or get a smith to cut a length of ten inches from a bar of steel an inch wide and half an inch thick; file its ends smoothly, harden it, and get somebody like myself to magnetise it.”
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