Nikola Tesla U.S. Patent 645,576 - System of Transmission of Electrical Energy Patent Wrapper Page 72

190 -650,343,--3. It then appears that this case sets forth that applicant contemplates transmitting energy through a stratum of air above the surface by means of high potential currents, but it is not at all clear how the apparatus will be constructed and arranged to permit such a transmission. The specification clearly discloses a conception, but it is not thought to be sufficiently complete to constitute constructive reduction to practice. For the statute requires (see section 4883 R. S.) that the application shall contain a description of the invention in such full, clear, concise and exact terms as to enable any person skilled in the art to make, construct, compound and use the same, and further that the applicant shall explain the best mode in which he has contemplated applying the principle of his invention. The specification now on file is probably sufficient to enable one skilled in the art to use the invention, provided he is furnished with an apparatus capable of producing the results described, but it is not sufficiently full and clear to enable one to construct and operate an apparatus capable of producing the results contemplated, Asaming a certain specified number of turns in the high potential coil of the transformer and a certain specified frequency, it should be stated what number of turns may be used in the low