This book, "Athanasii Kircheri Fuldensis Buchonii E Soc. Jesu, Mathematum in Collegio Romano Magnes Sive De Arte Magnetica Opus Tripartitum", by Athanasius Kircher, is a replication of a book originally published before 1643. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible.