The first aviators Russia : How do people learn to fly

- Yes, - the laboratorian has answered. - only I will not understand, why they

Thus, in formation of a chemical compound of underground waters participates very big to <

As a result of hydrolysis we receive hydrate okisi gland and hydrochloric acid.

Interest to a parachute was so is great, that Drevnitsky more ten jumps was necessary to make in Petersburg, and it them has made all more than four hundred, remaining safe and sound. It is better convinced, that the idea of a parachute is true and that she demands simply working off. Bulkiness and inconvenience of parachutes in use were so obvious, that many aeronauts preferred to fly without them. Many years before Russian inventor Kotelnikov has managed Were required to create a convenient design rantsevogo a parachute, reliable and convenient in using