Three years later, in 1891, Swedish engineers staged the first great demonstration of the transmission voltage on Tesla's system of 30,000 volts of Lauffena Frankfurt. A few years later power generation with Westinghouse engineers took the company "Cataract Construction", the president of which was one of our members - Edward Dean Adams. Today, it is interesting to recall that, helping Mr Adams, Lord Kelvin recommended to develop at Niagara Falls and Buffalo for transmission direct current. Proper assessment of the consequences of transfer or even the invention of Mr. Tesla's impossible and not necessary at this point. Everything has its time. Suffice it to say that if we have withdrawn from the industrial world the results of its work, would stop the wheels of industry, stood on a place of our trams and trains, would be plunged into the darkness of the city, would be frozen and stopped work and factories. Yes, the value of his work is so great that it was the foundation of all industry ... His name marks a whole era in the development of electrical science. This work gave rise to a revolution in electrical engineering.