rntgen rays and electro therapeutics with chapters on radium and phototherapy fig 212the bi cathode tube of koch of dresdenkoch asserts that where much in verse current must be overcome this tube acts both as an x ray and a ventril tube he believes thatthe anode being of a heavy design a large quantity of current may be employed with a shortenedexposure kny scheerer co fig 213the kny scheerer tubethe anode is placed into the tubular extension the latterbeing encased by a cylinder of lead flux glass a set of two specula of lead glass further serve tolocalize the x ra 2crjp3y.jpg from بنجابيsexxx tube View Photo