Show I LONG-DISTANCE LONG SOUNDS The report of a cannon travels els very far because It communicates a vibration vibration vibration tion to the soil soU The noise produced by the great eruption of Cotopaxi In 1744 was heard over oyer miles Fr Franklin asserts assert that he heard beard th the striking together of two stones in water water wa wa- wa ter half a mile mlle away awny In 1762 the report of a n cannon fired In Mayence could be heard at miles mUes away In the polar regions Sir John Franklin FrankIto Frank Frank- Ito lin conversed with c ease case e at a distance of ot more than a mlle mile When In 1800 1809 the cannon boomed In n the sound was sound was heard at Hanover a distance of ot miles D J The cannonading at nt Florence was waB heard beard at Leghorn 50 miles away and that that c at at Genoa over miles |