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Illustrated Encyclopedia of Science and Nature: Technology #27, Machines and Inventions I
ÔùÖ Inventions That Changed History ÔùÅ How did the first printing press work? ÔùÅ Who developed the telegraph? ÔùÅ How did Bell's telephone work? ÔùÅ How do mechanical clocks keep time? ÔùÅ What is a combine harvester? ÔùÅ How did the first camera work? ÔùÅ Who invented the box camera? ÔùÅ What is a kinetoscope? ÔùÅ What was early television like? ÔùÅ How does dynamite work? ÔùÅ What was the V-2 rocket? ÔùÅ How do electric generators work?rnrnÔùÖ Industrial and Scientific Machines ÔùÅ How do electron microscopes work? ÔùÅ What is a sound spectrograph? ÔùÅ How can lie detectors spot lies? ÔùÅ How do speed guns clock baseballs? ÔùÅ How is modern printing done? ÔùÅ How is modern printing done? ÔùÅ How do metal detectors operate? ÔùÅ What is a vacuum pump? ÔùÅ How is the flow of fluids measured? ÔùÅ How are precision measurements made? ÔùÅ How can air be purified? ÔùÅ What is a self-raising crane?rnrnÔùÖ Medical Marvels ÔùÅ How do instant thermometers work? ÔùÅ How is blood pressure taken? ÔùÅ What is a mechanical heart? ÔùÅ Why do bones show up on x-rays? ÔùÅ How do CAT scanners work? ÔùÅ What is an ECG? ÔùÅ Can a fibrescope see inside the body? ÔùÅ What is a sonogram? ÔùÅ Why is a stethoscope useful?
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