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Exhibit 19.4
Yuri Gagarin, the first man in space

On April 12, 1961, the Soviet scientists sent the first man, Major Yuri Gagarin in the spacecraft Vostok II into orbit. On February 20, 1962, the first American Lieutenant Colonel John H. Glenn Jr. manned the spaceship Friendship 7 into orbit. On July 20, 1969, two American astronauts, Neil Armstrong and Edwin E. Aldrin Jr. landed on the moon.

Exhibit 19.5
The US flag is placed on the moon.

Technological innovations helped to improve the quality of life in the modern world. Mechanical sewing was introduced by an American Isaac Singer, with the help of a sewing machine in 1851. The steam-driven printing press was introduced in 1813 by two Germans, Friedrick Koenig and Andrew Baver. Ottmar Mergenthaler invented the linotype printing technique. In 1867, an American, Christopher Sholes invented the typewriter and the Remington factory bought the manufacturing rights. Joseph Niepce discovered the method of making permanent photographic images. The American George Eastman, invented the "Kodak" camera.

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19.1 - Achievements In Physics
19.2 - Achievements In Chemistry
19.3 - Achievements In Biology
19.4 - Achievements In Medicine And Surgery
19.5 - Innovations In Transport And Communication
19.6 - Dates & Events

Chapter 20


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