Labels:text | book OCR: A B CHESTER CARLSON WILLIS CARRIER - 1906-1968 1876-1950 D E C HESTER CARLSON was born N THE LATE F in Seattle. He studied physics, 19th century, G and went to work in the patent air-cooling was H department of Bell Telephone Laboratories. In his work, Carlson carried out by blowing air over K had to carry out large quantities of ice. In the hot L copying using wet chemicals. The summer of 1880, Madison Square M task was laborious and messy. Theater in New York used four tons N This inspired him to develop a dry of ice at each performance. The first method of copying. Carlson's first true air conditioner was developed P Q successful experiment was in 1938, in 1902 by an American engineer and ten years later he had produced R named Willis Carrier. He installed S a working photocopier. Its success his system into Sackett- Williams, a T made him a multimillionaire. New York printing plant. W X Y Photocopier Air Conditioner M 1
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