Ceiling fan be used to reduce the stratification of warm air in a room by forcing it down to affect both occupants' sensations and thermostat readings, thereby improving climate control energy efficiency. Punkah-type ceiling fans date back to 500 BC, and are native to India. Unlike modern rotary fans, these punkah fans move air by moving to and fro, and were operated manually by cord. The first rotary ceiling fans appeared in the early 1860s and 1870s in the United States. At that time, they were not powered by any form of electric motor. Instead, a stream of running water was used,
Indian rope trick of the way so they wouldn't miss it. As the witnesses neared the room they dropped a thick rope from a balcony. The witnesses saw what they thought was the end of the trick, the rope falling as if it had been in mid-air seconds before. A sheet was then removed from a boy with fake blood at his neck and shoulders, hinting that his limbs and head had been reattached to his torso. According to their account, the rumour that a British couple had witnessed the trick was heard a few weeks later in England. Indian rope trick The