Following is one of the accounts of this lecture found in the newspaper archives.
The Daily Nevada State Journal, Reno, Nevada, Tuesday, June 30, 1891, Page 2.
For the entertainment of the American Institute of Electrical Engineers at Columbia College, New York, Nikola Tesla illustrated a lecture with a series of experiments which surprised and enlightened his audience. The New York Recorder says Tesla, who has a high reputation as an electrician, has been experimenting upon a practically new electric light, but it was not known outside his laboratory that he had achieved such wonderful results or came so near revolutionizing the theory of light. He demonstrated by experiments that incandescent lamps do not require two or three single wires to feed them, but that a single wire from a dynamo with a single branch to each lamp will answer the purpose equally well. He also does away with the carbon filament which furnishes the light in the incandescent lamps, and substitutes a solid block of carbon. The branch wire terminates in this block and causes a glow just as the continuous circuit does in the slender carbon filament now in use. This carbon filament is the most serious objection to the present form of incandescent lamps. It must necessarily be very slender to offer the required resistance to the passage of the current, and being carbon is also unavoidably of fragile substance, hence the filaments are constantly breaking, and each destroys a lamp, of which the estimated manufacture is 50,000 a day. The carbon blocks which Tesla purposes substituting for the lamps are made at little cost and can be depended upon to perform their work as reliably as a gas burner.
One of the most remarkable demonstrations made by Tesla was that showing the absolute harmlessness of his electric current. It was generated primarily from an alternating current dynamo, each as has so often been condemned as the essense (sic) of deadliness. This dynamo was speeded to its capacity, and by auxiliary aid the current was raised to 250,000 volts, which, under ordinary circumstances, would be 250 times more than sufficient to kill, yet