Show inventions by alexander bell before he had reached the age of 17 alexander graham bell had devised a method for removing the husks from wheat among his more important inventions may be mentioned the harmonic multiple telegraph the fundamental method that underlies the electric transmission of speech in any torm in any part of the world the magneto electric electr ic i speaking telephone the photo phone for transmitting speech and other sounds to a distance by means of a beam of light an induction balance with magneto electric telephone for painlessly locating bullets or other metallic masses lodged I 1 in n the human body telephone probe to determine the position and depth of metallic masses in the body the for determining the range of audibility of different substances in the spectrum tetrahedral kites and kite structures bell was joint inventor of the and flat disc records for recording and r reproducing speech music and other sounds and also joint inventor in a number of improvements designed to promote aerial locomotion in connection with thy the aerial experiment association 1903 08 03 |