. Radiography and the 'X' rays in practice and theory : with constructional manipulatory details . e kindly placed at our disposal for reproduction wehave selected fig. 46, which shows the relative trans-parency of various substances to the X rays. Theexposure given was 2^ minutes on a rather slow square marked 1 is the faint image given by mica,2 is a piece of wood, 3 is tinfoil, 4 is a vulcanite disc,5 is a brass disc, 6 is the image given by the tooth ofa horse, 7 a brass medal, 8 a piece of cork, 9 is a thinmicro-covering glass; by comparison it is seen to bealmost as opaque to t
. Radiography and the 'X' rays in practice and theory : with constructional manipulatory details . e kindly placed at our disposal for reproduction wehave selected fig. 46, which shows the relative trans-parency of various substances to the X rays. Theexposure given was 2^ minutes on a rather slow square marked 1 is the faint image given by mica,2 is a piece of wood, 3 is tinfoil, 4 is a vulcanite disc,5 is a brass disc, 6 is the image given by the tooth ofa horse, 7 a brass medal, 8 a piece of cork, 9 is a thinmicro-covering glass; by comparison it is seen to bealmost as opaque to the rays as the vulcanite No. 4. No. 10, which is a piece of india-rubber, is interest-ing as showing the difiference of X ray transparencyimparted to the rubber, by the addition of sulphur, as 172 liADJuaiiArijy in No. I and No. 12. No. 11 is ji Hteel spring, andNo. 12 II vulcaniBod india-rulihrr ring. Ii^. 17 is a radiograph of a mouse. This wastaken on a Cadett Lightning plate, the tube beingT) in. from the mouse, with an exposure of 1 developer used was the old * ferrous
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Keywords: ., bookcentury1800, bookdecade1890, bookidradio, bookpublisherlondon
