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,
Carrick-a-Rede Rope Bridge Carrick-a-Rede Rope Bridge Carrick-a-Rede Rope Bridge (locally pronounced carrick-a-reedy) is a famous rope bridge near Ballintoy in County Antrim, Northern Ireland. The bridge links the mainland to the tiny island of Carrickarede (). It spans and is above the rocks below. The bridge is mainly a tourist attraction and is owned and maintained by the National Trust. In 2009, it had 247,000 visitors. By 2016, that had increased to 440,000 visitors. The bridge is open all year round (subject to weather) and people may cross it for a fee. It is thought salmon fishermen have been building bridges to the