How did pneumatic tires come about? Detailed answer

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How did pneumatic tires come about? Detailed answer

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How did pneumatic tires come about?

Pneumatic tires were invented by Scottish veterinarian John Boyd Dunlop (1840-1921). In 1887, he created the first practical pneumatic, that is, air-filled chamber for a vehicle wheel. In 1889, he founded the Dunlop Rubber Company Ltd in London, which soon had branches around the world.

Soon Dunlop passed the patent for the pneumatic tire to his partner Harvey du Grosse, making almost no profit from his invention, which meant a revolution in transport.

Author: Mendeleev V.A.

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Why do animals love salt?

The passion for salty foods in both humans and animals is one of the most interesting mysteries of wildlife. We know that for thousands of years man has valued salt and used it for cooking. In ancient Mexico, salt was considered such an important product that every year a beautiful girl was sacrificed to the salt god.

Today, examples are known when a prisoner in prison, who was brought food without a grain of salt in it, began to go crazy from its lack. The fluid circulating in our body is a salt solution. Since our body releases a certain amount of moisture from itself in various ways, with which the body loses salt, these losses must be compensated.

Salt reserves on Earth are distributed in such a way that a huge amount of it is contained in ocean water, while on land its reserves are relatively small.

Plants contain a small amount of salt, and it is washed out of the soil by rains into rivers and further into the seas and oceans. Animals - inhabitants of the land, however, once descended from marine inhabitants. The composition of their body juices is the same as that of their ancestors, and similar to sea water!

And since neither the plants nor the soil can provide them with enough salt, they pounce on any salty food with such greed. Only carnivores, that is, those that eat other animals, do not have a special craving for salty food: they get salt along with the meat of their victims. In contrast, most herbivores are very fond of salt.

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