. A text-book of radiology . ck and out ofcontact—preventing its acting as a cooling agentaltogether. The heavy anode tubes are free from this defect.(Fig. 17.) The face of the disc is backed up with a heavymass of metal of large section, which absorbs the heatalmost as quickly as it is formed, and for short intenseexposures it is quite satisfactory. The heavy anode tube has undergone many improve-ments lately, so that at the time of writing it is the type TUNGSTEN ANTI-CATHODES. 47 in general use. The impact of the cathode rays is receivedby a disc of tungsten let into the face of the massive
. A text-book of radiology . ck and out ofcontact—preventing its acting as a cooling agentaltogether. The heavy anode tubes are free from this defect.(Fig. 17.) The face of the disc is backed up with a heavymass of metal of large section, which absorbs the heatalmost as quickly as it is formed, and for short intenseexposures it is quite satisfactory. The heavy anode tube has undergone many improve-ments lately, so that at the time of writing it is the type TUNGSTEN ANTI-CATHODES. 47 in general use. The impact of the cathode rays is receivedby a disc of tungsten let into the face of the massivecopper anti-cathode. Apart from its higher meltingpoint, it is found that a greater production of X-raysattends the use of metals of high atomic is higher than platinum, and other things beingequal a tungsten anti-cathode is more efficient than oneof platinum. Though of high initial cost they areeconomical in practice, and the process of exhaustion hasbeen so improved that they are sent out in condition for.
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Keywords: ., bookcentury1900, bookdecade1910, bookidtextbookofra, bookyear1915
