... of the air accompanying the said vocal or other sounds. After inventing the telephone, Bell continued his experiments in communication, which culminated in the invention of the photophone-transmission of sound on a beam of light- a precursor of today's optical fiber systems. He also worked in medical research and invented techniques for teaching speech to the deaf. The range of Bell's inventive genius is ... two for a selenium cell. Eager to infuse a love of science and the natural world in others, Bell lent considerable financial and editorial support to both Science magazine and Natio...

• Word Count: 695
• Approx Pages: 3
• Grade Level: Undergraduate