Show among the curious effects acts ascribed to lightning is the magnetization magnetic of parts of rock struck by it says the detroit tribune the existence of such magnetized P rocks has long iong been known but the supposition that their condition A as duo due in mapy many cases to lightning I 1 has only recently been confirmed by a curious observation of dr Folgherait er among the walls of anici ancient ent buildings building nn the campagna near rome he found t kocg ay iy mag magnetic betic points and zones I 1 IE L i walls precisely like those occasion a y encountered in rocks the fact that tl it the magnetization often included more ore than one block of tone stone inthe in the wall was as regarded ns as proving that the magnetic property had after the building was erected and the nency agency n ency of lightning was indicated indica tedi by neighboring cracks in the walls |