(Mitchell Stephens, Grolier Encyclopedia) The dictionary entry for television is as follows: "an electronic system of transmitting transient images of fixed or moving objects together with sound over a wire or through space by apparatus that converts light and sound into electrical waves and reconverts them into visible light rays and audible sound 2: a television receiving set 3 a: the television broadcasting industry b: television as a medium of communication." ... The people working on the mechanical television, which were Charles Jenkins and John Baird, and the people working on the elec...

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• Approx Pages: 5
• Has Bibliography
• Grade Level: High School

Drew, Charles R. ... Charles Richard Drew (1904-1950) was an American medical doctor and surgeon who started the idea of a blood bank and a system for the long-term preservation of blood plasma (he found that plasma kept longer than whole blood). ...

• Word Count: 3305
• Approx Pages: 13
• Grade Level: High School