Biobliographical history of electricity & magnetism
“ Ptolemæus, Claudius, the great Egyptian mathematician, geographer and astronomer who flourished in middle of the second century after Christ, is frequently alluded to throughout four of the books of De Magnete, and Gilbert makes direct reference to the “Opus Quadripartitum,” “Cosmographia” and “Geographia.” The last is, however, the work with which Ptolemy’s name is most prominently connected. It was the standard up to the time of the marine discoveries of the fifteenth century, and has been translated and published into editions too numerous to mention here. ”
