1856 BOOK: "GUMMERE'S SURVEYING" PLANE TRIGONOMETRY UNION SCHOOL AMITY TWP PA.  Inscription inside with a name says Union School, Amity (Amity Township PA), Nov 23, 1857.  Has some cover wear, front cover is a bit lose.  Inside pages are in good shape, some light brown spotting here and there, some light water marks here and there.  Comes as seen, free shipping.