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David Lennox (April 15, 1855 – February 15, 1947) was an American inventor and businessman. A furnace manufacturing business he founded in 1895 in Marshalltown, Iowa evolved into what is today known as Lennox International, a global corporation specializing in air conditioning, heating, and commercial refrigeration.
'Freon' is the brand name for the refrigerants R-12, R-13B1, R-22, R-410A, R-502, and R-503 manufactured by The Chemours Company, and so is not used to label all refrigerants of this type. They emit a strong smell similar to acetone. [2] Freon has been found to cause damage to human health when inhaled in large amounts.
The first air conditioners and refrigerators employed toxic or flammable gases, such as ammonia, sulfur dioxide, methyl chloride, or propane, that could result in fatal accidents when they leaked. [4] In 1928 Thomas Midgley Jr. created the first non-flammable, non-toxic chlorofluorocarbon gas, Freon (R-12).
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Drawing the retorts at the Great Gas Establishment Brick Lane, from The Monthly Magazine (1821). The history of gaseous fuel, important for lighting, heating, and cooking purposes throughout most of the 19th century and the first half of the 20th century, began with the development of analytical and pneumatic chemistry in the 18th century.
WSOC-TV presently broadcasts 37½ hours of locally produced newscasts each week (with 5½ hours each weekday and five hours each on Saturdays and Sundays); in addition, the station produces an additional 17 hours of newscasts each week for sister station WAXN-TV (in the form of a two-hour extension of WSOC's weekday morning newscast and an hour-long 10 p.m. newscast).
With the station in private ownership for the first time in its 44-year history, Citadel faced the challenge of revitalizing a station that had been a consistent doormat in central Iowa TV news. WOI had never had more than a 15-percent share of the audience for local news and sat at 7 percent in the May 1994 Nielsen sweeps; in comparison, KCCI ...
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