Abstract
WE have read with interest in the Notes columns of NATURE of October 18 a description of what is called a stereo-radioscope, said to be invented by one Major Lièvre. What interests us so much is the fact that Sir J. Mackenzie-Davidson invented the same thing no fewer than twelve years ago. The instrument was made by our firm and put on the market for several years. As the two sources of rays have to be about 6 cm. apart, the only practical method was found to be to build a special X-ray tube with two anti-cathodes in the same bulb.
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HARRY W. COX AND CO., LTD. Stereo-Radioscopes. Nature 100, 146 (1917). https://doi.org/10.1038/100146a0
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DOI: https://doi.org/10.1038/100146a0
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