Three english important inventions

THREE ENGLISH IMPORTANT INVENTIONS

PHOTOGRAPHY

It’s hard to say who was the inventor of photography but we know that the first fixed image was made by Joseph Niépce in 1826 but it took eight hours to expose. Later, in 1835, Fox Talbot made it develop by using silver iodide on paper and found a way to produce a translucent negative that could be used to make any number of positives by contact printing – a system used until the arrival of digital cameras.

SYNTHETIC DYE

William Perkin was studying Chemistry when he discovered how to make synthetic dye like purple. In 1856 he was using alcohol to clean up some chemical residue when he suddenly saw an intense purple colour appear. At that time, purple dye was one of the priciest. William worked to produce his new colour and patented it and set up a company to produce it.

WIND-UP RADIO  

In 1991, Trevor Baylis saw a television programme that talked about the necessity of communicate information about AIDS to people in Africa and to stop its spread. So Baylis designed one radio that needed no batteries, running off an internal generator powered by a mainspring rolled up by a hand crank. He was able to show it to Nelson Mandela and since then, it’s been distributed all over Africa.