On the Röntgen X rays, or the new photography / by J.T. Bottomley ... Lord Blythswood and Dr. John Macintyre.
- James Thomson Bottomley
- Date:
- 1895
Licence: Public Domain Mark
Credit: On the Röntgen X rays, or the new photography / by J.T. Bottomley ... Lord Blythswood and Dr. John Macintyre. Source: Wellcome Collection.
Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.
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![[FROM THE PROCEEDINGS OF THE PHILOSOPHICAL SOCIETY OF GLASGOW.} THE NEW PHOTOGRAPHY. On the Rontgen X Rays, or the New Photography. By Dr. J. T. Bottomley, F.R.S.; the Right Hon. Lord Blyths- wood; and Dr. John Macintyre, F.R.S.E. [Read before the Society, 5th February, 1896.] Three papers on different branches of the subject of the X rays of Professor Rontgen, of Wurzburg, were communicated to the Society at the meeting held as above. I.—Dr. J. T. Bottomley on the Discoveries of Hertz, Lenard, and Rontgen. I have been asked to open this joint-communication from Lord Blythswood, Dr. Macintyre, and myself, and to say a few words on the subject of the discharge of electricity through vacuum tubes, and particularly on such parts of the subject as maybe considered to have led up to the wonderful discovery by Professor Rontgen, which, within the last few weeks, has taken the scientific world, and even the general public, by storm. The beautiful luminous phenomena which accompany the passing of an electric discharge through a vessel, which has been almost completely evacuated of air, have long been known; and, indeed, I myself have had the pleasure, on more than one occasion, of calling the attention of the Society to some of them. When a discharge is passed through air of ordinary density, it generally passes as a spark or as a 11 brush discharge, with more or less disturbance of a somewhat violent kind, and in an obviously discontinuous manner. If the points between which the discharge is taking place are within a glass tube, the effect is still the same. But ,if now the air is withdrawn gradually from the tube by means of one of the modern air pumps, with which we can obtain a very complete vacuum, we observe a very interesting set of phenomena as the process of evacuating the tube goes on. When the pressure](https://iiif.wellcomecollection.org/image/b24967725_0005.jp2/full/800%2C/0/default.jpg)
