File:Tesla colorado adjusted.jpg

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Summary

Description
English: Publicity photo of Serbian-American inventor Nikola Tesla in December 1899 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 by Century Magazine photographer Dickenson V. Alley 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 300 kW generated voltages on the order of 12 million volts at frequencies around 150 kHz, producing 140 ft. (41 m) "lightning" bolts.
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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.jpg

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Public domain
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.

Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country.
Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Tesla_colorado_adjusted.jpg

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Date/TimeThumbnailDimensionsUserComment
current13:17, 6 November 2011Thumbnail for version as of 13:17, 6 November 2011900 × 698 (318 KB)TholmeHigher quality
20:48, 2 February 2007Thumbnail for version as of 20:48, 2 February 2007826 × 664 (193 KB)Skies== 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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