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Alexander Graham Bell (1842-1922) was a scientist, inventor and engineer.

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He was born in Scotland, but he moved to Canada and then the USA when he was a young man. Bell produced his first invention when he was just 12 and continued to invent things all his life.

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Bell's mother became deaf when he was a child and this started his interest in sound. He worked with deaf students for many years and started designing machines to transmit sound as early as 1863.

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Bell started to develop a Machine to transmit the human voice while he was teaching in Boston in the 1870's. The telephone was the result.

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The first phone call was to Bell's assistant, Thomas Watson, on 10th March 1876. The first words were, "Watson. Come here. I want to see you."
The Bell Telephone Company began in 1877 and by 1886 0ver 150,000 people in America had telephones.

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There are approximately 1.14 billion landline phone subscriptions in the world and nearly 7 billion mobile phone subscriptions - 95.5% of the world's population! In the UK, 93% of people have a mobile phone, and in the USA it's 90%.

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Thomas Watson

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How to construct a working model of Alexander Graham Bell's first telephone

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1842-1922) was a scientist, inventor and engineer

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Nicolas-Joseph Cugnot (Void-Vacon, France, September 25, 1725. He was a French inventor to whom the French government credits the invention of the first self-propelled vehicle or automobile.
Cugnot received training as a military engineer. It carried out tests of models of vehicles powered by steam engines for the French Army, designed to drag heavy guns, a task that began in 1765.

Cugnot seems to have been the first to transform the forward-backward motion of a steam piston into rotary motion. In 1769 he got a version of his Fardier à vapeur (“steam car”) to work. The following year he built an improved version. His vehicle was said to be capable of pulling 4 tons and rolling at speeds of up to 4 km / h. The very heavy vehicle had two rear wheels and one front wheel, which supported the steam boiler and was steered by a tiller.

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Alexander Graham Bell
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