About a year ago Blondlot, a French investigator, while working on polarization of x-rays, made certain observations which led to the discovery of a new variety of rays. He found that there were emitted from his focus tube invisible emanations which would pass through a thin plate of aluminum, could be focused by a quartz lens, and falling on a small electric spark would cause a very noticeable increase in the brightness of the spark. Work on these rays has very rapidly progressed during the past year, so that at present a large amount of data has been obtained regarding them.1 The work has been limited largely to France and has been done mostly by the discoverer, Blondlot, and by Charpentier, who has developed the subject especially along physiologic lines. These rays have been named N rays from the first letter of the town Nancy, at which place
THE N RAYS. JAMA. 1904;XLII(16):1023–1024. doi:https://doi.org/10.1001/jama.1904.02490610033005
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