The past week or so here in Raleigh, it's been
around 90 degrees Fahrenheit
(there's a nice Polish name), so air conditioners are getting
workouts.
John
Gorrie thought the Florida summer heat and miasma from rotting
vegetation caused yellow fever and malaria. Though quinine was
effective against malaria, there was nothing available to cure or
vaccinate against yellow fever.

Statue of John Gorrie in National
Statuary Hall Collection
Gorrie died in June, 1855, 150 years ago. The Wikipedia says June
29,
Today in
Science says June 16th. He invented the first mechanical
refrigeration system, the development of which is
number 10 in the
National Academy of Engineering's
Greatest Engineering
Achievements of the 20th Century.
Gorrie's
Fridge, a page at the University of Florida by physics
professor Gary G. Ihas, has a brief history of pre-commercial and
commercial refrigeration and air conditioning.
There's an article about Boston's Frederick Tudor and his
successful scheme to transport ice on ships to the tropics, as far
as Calcutta, at
Cool
Customer, Frederic Tudor and the Frozen-Water Trade. Just as
Poland Spring today markets its water as distinctively pure, so in
the 19th century 'the clean rivers of Maine provided much of the
East coast ice' using that marketing technique when medical
officials questioned the safety of using ice from increasingly
polluted lakes and rivers. Eventually, electricity and electric
refrigerators replaced the iceman and the icebox.