Our fast-paced world of fax machines, digital cameras, and cell phones is possible because of the work of inventors who paved the way for modern communications. Meet: Reginald Fessenden, who thought of a continuous wireless signal when he noted the ripples resulting from a rock he tossed in a lake;
Alexander Graham Bell, who made his famous call u \“Mr. Watson, come here! I want you!\” u because he had spilled acid onto his trousers;
William Stephenson, inventor of the wirephoto, who was a spy during the Second World War. From newsprint to fiber optics, discover ten great inventions in this fascinating book, and a great resource for science projects and science fairs:

Make your own paper

Create your own halftone image

Make your own pinhole camera

Make a telegraph

Use Morse code

Make a light fountain