File:Tesla colorado.jpg

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English: Publicity photo of Croat-Serbian-American inventor Nikola Tesla in December 1899 supposedly sitting in his laboratory in Colorado Springs next to his magnifying transmitter high voltage generator while the machine produced huge bolts of electricity.

This image was created using "trick photography" via a double exposure. The electrical bolts were photographed in a darkened room. The photographic plate was exposed a second time with the equipment off and Tesla sitting in the chair. In his Colorado Springs Notes Tesla admitted the photo was a double exposure:

To give an idea of the magnitude of the discharge the experimenter is sitting slightly behind the "extra coil". I did not like this idea but some people find such photographs interesting. Of course, the discharge was not playing when the experimenter was photographed, as might be imagined!

and this is confirmed by Tesla biographers Carl Willis and Marc Seifer.

In 1899-1900 Tesla built the laboratory and researched wireless electric power transmission there. The "magnifying transmitter", one of the largest Tesla coils ever built, with an input power of 150 kW generated voltages on the order of 12 million volts at frequencies around 150 kHz, producing 140 ft. (41 m) "lightning" bolts.

Tesla sent a copy of this photograph to Sir William Crookes in England in 1901.

Source en:Image:Tesla colorado 444px.jpg 2005-10-19 02:27:48

Conversely a copy of the original photograph was collected by Leland I. Anderson who sold the collection to Tesla Wardenclyffe Project. They now claim copyright. Note that the version in that archive includes a hand written note added in 1901 printing which doesn't appear on the more widely available image.

The unretouched image, without Tesla, appears in Nikola Tesla, "The Problem of Increasing Human Energy", Century Magazine, The Century Co., New York, June 1900, fig. 8
Author Dickenson V. Alley, photographer, Century Magazine
Other versions

Nikola Tesla in laboratorul sau din Colorado Springs.jpg
Nikola Tesla, with his equipment Wellcome M0014782.jpg
Tesla colorado adjusted.jpg


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current06:46, 4 May 2006Thumbnail for version as of 06:46, 4 May 2006826 × 664 (195 KB)Yelm (talk | contribs)== Summary == Publicity photo of a participant sitting in Nikola Tesla's laboratory in Colorado Springs circa 1900. The laboratory was built in 1899. Tesla sent a copy of this photograph to Sir William Crookes in England in 1901. This image i
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