An essay on the history of electrotherapy and diagnosis; . It isalleged that he has been able to utilise his discovery to photographmetals enclosed in wooden or woollen coverings, and has succeededin obtaining pictures showing only the bones of living persons, theexplanation being that, while wood and Hesh freely allow thenewly discovered actinic rays to pass through them, bones andmetals are opaque to them. So far as we can gather from thereports, Prof. Rontgen uses as his source of light one of high-vacuum tubes, electrically excited. If this is placed HISTORY OF ELECTROTHERAPY 13
An essay on the history of electrotherapy and diagnosis; . It isalleged that he has been able to utilise his discovery to photographmetals enclosed in wooden or woollen coverings, and has succeededin obtaining pictures showing only the bones of living persons, theexplanation being that, while wood and Hesh freely allow thenewly discovered actinic rays to pass through them, bones andmetals are opaque to them. So far as we can gather from thereports, Prof. Rontgen uses as his source of light one of high-vacuum tubes, electrically excited. If this is placed HISTORY OF ELECTROTHERAPY 131) on one side of a box containing a metallic body, or if a hand is heldin front of it, and a sensitive plate is arranged on the oppositeside, a photograph of the metal, or of the bones of the hand, asthe case may be, is obtained. The scientific world will lookforward with interest to the publication of the details of work. As may be imagined, the scientific world did forthwith takea remarkable interest in the new phenomenon, Fnthisvolume. The Nhw Photographic Discovery. ThanVs to the discovery of Professor Rontgen, the German Emperor willnow be able to obtain an exact photograph of a Backbone of unsus-pected size and strength. —Punch, Jan. 25th, 1896. of Nature (vol. 53), which, in all, covers the issues betweenNovember 7th, 1X95, and April 30th, 1X90, the subject ofRontgen rays occupies exactly one column oi closely printedmatter in the index, although the preliminary notice we havequoted did not appear until the middle of January. The nextnumber of the same journal brought a letter from ProfessorSchuster, which is interesting as foreshadowing at that early HO AN ESSAY ON THE date our modern views upon the nature of the X rays ; hewrites as follows :— Prof. Rontgkxs remarkable discover)- will materially affect ourviews concerning the relation between the ether and matter ; butfurther experimental evidence is required before any opinion canbe expressed as to
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