Anthony's photographic bulletin for .. . 298 verse vibrations in the luminiferous ether. Lord Kelvin pointed outthat if this were so, as they are a hundred times more frequent thangreen light, X rays would produce seventy thousand million millionvibrations per second. This is rapid with a vengeance, and the onlywonder is that X rays stop at anything. - -oo>ei<oo To save the trouble and sometime loss of making- fluoroscope screensby the usual method of coating with collodion and sifting on of calciumtungstate, it is suggested that a piece of thin cardboard, in which anopening of the desir
Anthony's photographic bulletin for .. . 298 verse vibrations in the luminiferous ether. Lord Kelvin pointed outthat if this were so, as they are a hundred times more frequent thangreen light, X rays would produce seventy thousand million millionvibrations per second. This is rapid with a vengeance, and the onlywonder is that X rays stop at anything. - -oo>ei<oo To save the trouble and sometime loss of making- fluoroscope screensby the usual method of coating with collodion and sifting on of calciumtungstate, it is suggested that a piece of thin cardboard, in which anopening of the desired size has been cut, be glued to a sheet of alumin-ium. Over this is fastened a second piece of cardboard, the spacebetween this second piece and the aluminium being filled with a uni-form layer of calcium tungstate. ooNKo* The first object of a color screen is to cut out the invisible ultra-violet and the dark violet rays, and at the same time the action in theblue should be greatly reduced. There are plenty of dye-stuffs whichcut out
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectphotogr, bookyear1870
