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Have driving licenses always existed? Detailed answer

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Directory / Big encyclopedia. Questions for quiz and self-education

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Did you know?

Have driving licenses always existed?

No. Until 1910, when such rights were first introduced in Germany, it was enough to buy a car and pay a tax.

Author: Mendeleev V.A.

 Random interesting fact from the Great Encyclopedia:

Who was the first to vaccinate?

One day, in 1768, a young thrush woman came to a Gloucestershire doctor for a consultation. During the conversation, smallpox was mentioned, causing general fear in those days. The thrush noticed that she could not catch it, because she had already had cowpox, a disease whose symptoms were the same as those of smallpox, but it proceeded in a much milder form. The importance of her remark did not escape the attention of Edward Jenner, who was present when the young medical student spoke.

The idea completely took over his mind. Having received his diploma, he returned as a practicing physician to his small village in Gloucestershire in 1773, where for the next twenty years he devoted all his free time to research and experiment. He found out that the thrush was right - cowpox survivors very rarely got real smallpox.

In 1796, he did the first experiment, which was that he inoculated people with cowpox in order to subsequently protect them from smallpox. In 1798, for the first time, he made the most important experiment: first, cowpox was vaccinated in four children, and then real smallpox. To his great joy, none of them fell ill with this terrible disease.

Vaccination, or inoculation, was his great discovery, which made it possible to almost completely get rid of this disease. At first, vaccination had many opponents, but eventually its necessity became so universally recognized that in almost all civilized countries in our time the entry of foreigners is allowed only on the condition that they have received all the necessary vaccinations.

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Power supply PID-250 with two outputs 26.03.2007

Mean Well has released a new PID-250 power supply with two independent outputs for industrial automation and telecommunications systems and devices. The power of the product is 250 watts.

Various output voltage options are available: 12 and 5V, 24 and 5V, 36 and 5V or 48 and 5V depending on the model. Versions of the new power supply are available in two designs: open board or housing. Power supplies have a universal input, a built-in power factor corrector, a set of protections, and operate in a wide temperature range from -20 to 70°C.

A useful feature is the ability to remotely turn on/off the first output.

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