Tesla on the D.C. motor In a paper presented before the American Institute of Electrical Engineers in 1888, Tesla criticized the illogical construction of the D.C. motor. ``In our dynamo machines, it is well known, we generate alternate currents which we direct by means of a commutator, a complicated device and, it may be justly said, the source of most of the troubles experienced in the operation of the machines. Now, the currents, so …showed first 75 words of 617 total…

…showed last 75 words of 617 total…By its means the human voice and likeness will be reproduced everywhere and factories driven thousands of miles from waterfalls furnishing the power; aerial machines will be propelled around the earth without a stop and the sun's energy controlled to create lakes and rivers for motive purposes and transformation of arid deserts into fertile land...'' Nikola Tesla, "My Inventions: the autobiography of Nikola Tesla", Hart Bros., 1982. Originally appeared in the Electrical experimenter magazine in 1919.