By Lionel Bender

The main relied on nonfiction sequence out there, Eyewitness Books supply an in-depth, complete examine their matters with a distinct integration of phrases and images.

A attention-grabbing examine the world's earliest basic machines — wheels, gears, pulleys, and levers — to cutting-edge complex phones and plastics, Eyewitness: Invention provides the tales in the back of notable innovations and the way they replaced the world.

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Heating element 54 (c) 2011 Dorling Kindersley. All Rights Reserved. EASY MIXING The 1918 food mixer had two blades driven by an electric motor. A hinge allowed the mixer to be turned to a horizontal position. Electric motor KEEPING WARM GOOD GROOMING Early electric heaters used the Dowsing bulb. This was like an oversized light bulb, which was coated on the outside and mounted in front of a reflector in an attempt to concentrate the heat given off. The 1925 electric hair dryer had a simple heater and a small fan.

It was used as a substitute for ivory to make billiard balls, and for small items like this powder box. The new material made little impact at first, but in 1889 George Eastman began using it as a base for photographic film. Unfortunately, it had the disadvantage that it easily caught fire and sometimes exploded. In 1862 Alexander Parkes made a hard material that could be molded into shapes. Called “Parkesine,” it was the first semi-synthetic plastic.  They were used for boxes, clock cases, piano keys, and lamps.

Young people were employed to crawl under machines to mend broken threads or pick up fluff. Bobbins POWER WEAVING The first steam-powered loom appeared in 1787. It could pass the shuttle across the cloth over 200 times a minute. By the 1830s, steam- and water-powered weaving machines were common in factories. Drive wheel 37 (c) 2011 Dorling Kindersley. All Rights Reserved. Batteries Metal electrodes Over 2,000 years ago, the Greek scientist Thales produced small electric sparks by rubbing a cloth against amber, a yellow resin formed from the sap of long-dead trees.

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Invention (DK Eyewitness Books) by Lionel Bender
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