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In 1805, two years after Gorrie’s birth, a young Boston businessman had taken as a challenge an offhanded question his brother had asked at a party. Why can’t the ice of New England’s ponds be harvested, transported to and sold at ports in the Caribbean?Within the year, Frederic Tudor arranged for his first shipment of ice to Martinique, an enterprise that might have been deemed a success had a goodly amount of the cargo not melted soon after its arrival. Tudor spent the next few years experimenting with various kinds of insulation before settling on sawdust. He constructed icehouses throughout the tropics and created a demand there for cold refreshments. In the 1820s he joined forces with a young inventor who developed the plowlike sawing machines that scored and cut New England’s frozen ponds into symmetrical blocks. By 1846, Tudor was shipping tens of thousands of tons of ice from Boston to destinations all over the globe. His monopoly remained unchallenged for decades. "The coast is now cleared of interlopers," the Ice King once declared. "If there are any unslain enemies, let them come out."
In 1833, the same year that Tudor made news by shipping 180 tons of ice from New England to Calcutta, Dr. John Gorrie arrived in the sweltering town of Apalachicola, a burgeoning cotton port on the west coast of Florida.
Gorrie set up a medical practice and took on the positions of postmaster and notary public to supplement his income. After three years of civic involvement, he was elected the town’s mayor. But when yellow fever hit the area in 1841, Gorrie dedicated the bulk of his time to his practice—and to finding a treatment for his many patients.
Although he did not know that yellow fever was spread by mosquitoes, he had observed that outbreaks of the disease seemed to be influenced by heat—"Nature would terminate the fevers by changing the seasons," he noted. He devised a method of cooling his infirmary. He would suspend a pan of ice from the ceiling and make an opening through it so air could escape through the chimney.
In the large home where he’d lived first as boarder, then as husband to the proprietress, Gorrie had already begun transforming room after room for his practice and his experiments (much to the chagrin of his wife). But he still faced one problem. The cooling mechanism required ice, and supplies were limited. Somehow, he would need to make it himself.
Working obsessively, he followed the same basic principles that had driven previous refrigeration attempts—most notably, William Cullen’s 1755 creation of ice by evaporating ether in a vacuum.
When a liquid evaporates into a gas, it does so at a particular temperature, which varies depending on the amount of pressure it is under. As it evaporates, the liquid extracts heat from the surroundings, cooling them. Likewise, when a gas is compressed, it is heated; when the pressure is removed, and the gas expands, it absorbs heat, cooling its surroundings.


Comments
I was born and raised in Apalachicola, and I tell you that the people are proud of the fact that air conditioning was invented there. There is a mueseum there telling about his life. People who are interested should go see it!
Posted by Robert M. Scarabin on October 3,2009 | 03:06AM