1From John Adams to Boston Patriot, 6 January 1812 (Adams Papers)
.... Break the stone to pieces, and each morsel contains two poles, a north and a south pole, and does not loose its virtue. The magnetic effluvia are too subtle to be seen by a microscope; yet they have great activity and strength. Iron has a sympathy with magnetism and electricity, which should be examined by every experiment, which ingenuity can devise. Has it been tried, whether the magnet...