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He chose the tobacco virus because it was easy to get and to grow. It was a strong virus, hard to destroy during experiments; and it was a plant virus, so that the scientist did not have to use animals. Thus began three years of very hard work. His ob32 Virus ject was to separate the pure virus by chemical methods. He planted tobacco plants and watched them grow. While they were still young, he gave them tobacco disease. Then the plants were frozen and cut into tiny bits. He pressed out the tobacco juice that he knew contained the virus.

He stated that time slows in a system in motion, and f he greater the speed, the slower the movement of time. For example, imagine that a man in a plane makes his watch agree with a clock on the ground at twelve o'clock. Then he goes on a trip in space, traveling for the entire time at exactly 93,000 miles a second. When he lands, the clock on land says 1:00 o'clock, but his watch says 12:54. This story shows that the flow of time is slower for systems in motion. When the plane traveled at 93,000 miles a second, one-half the speed of light, time moved only 9/10 as fast as time does in a system at rest.

This defense mechanism is called repression. Freud gives an example of repression in his own case. Someone was telling him about a summer resort with three hotels. Freud, who had been at this resort many times, insisted that there were only two hotels there. When told the name of the third hotel, Freud realized that it had been repressed from his conscious memory because it reminded him of the name of a doctor whom he disliked. A very popular defense mechanism, similar to repression, is denial.

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Advances of Modern Science by Melvin Berger

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