00480pamaa2200157 4500 0000020802 20060320090000.0 0674216458 (pbk) / 067421644X 538.4 LIV QC757 LIV LIVINGSTON Driving force : the natural magic of magnets James D. Livingston. Cambridge: Harvard University Press, 1996. xiv, 311p.: ill.; 23cm. Magnets Magnets -- Industrial applications