. Röntgen rays and electro-therapeutics : with chapters on radium and phototherapy . interferes in no manner with its working. In regard to the consumption of tubes by the use of small and largeinductors the conclusions reached by Albers-Schonberg are of the greatestpractical importance. He has kept a complete record of the use of eachtube and the conditions under which it was used, and concludes that thelife of a tube used with an 80 cm. coil is more than three times as longas when used with a 40 cm. coil. The small coil used in this instancewas the Dessauer instrument. At the same time he fo
. Röntgen rays and electro-therapeutics : with chapters on radium and phototherapy . interferes in no manner with its working. In regard to the consumption of tubes by the use of small and largeinductors the conclusions reached by Albers-Schonberg are of the greatestpractical importance. He has kept a complete record of the use of eachtube and the conditions under which it was used, and concludes that thelife of a tube used with an 80 cm. coil is more than three times as longas when used with a 40 cm. coil. The small coil used in this instancewas the Dessauer instrument. At the same time he found that the workdone by the tube in connection with the large coil was more order to get the desired results with the small coil it was necessary touse a ventril tube in series with the Rontgen tube, while with a largecoil none was used. When the vacuum becomes so high or so low (Fig. 96) that it isunsuited for the operators purpose, and his efforts to restore a propervacuum are unavailing, the only remedy is a repumping of the tube bythe manufacturer. Plate SELF-REGULATING X-RAY TUBE. LOW VACUUM.(Fig. 96.) THE EONTGEN EAY APPARATUS. 189 III. The Fluoroscope and , Construction of the Fluoroscope. The fluoroscope, also called cryptoscope and iristoscope, was devisedand first described by Professor Salvini, of Eome.^ It consists of a dark-ened chamber, having the shape of a photographic camera. At thelarger end is fixed the fluorescent screen; at the smaller end is an opening(fitting the examiners forehead) through which the shadows on thescreen may be observed. With a fluoroscope a darkened room is unnec-essary. The majority of fluoroscopes are provided with a handle forholding the apparatus. More recent ones are so constructed as to permitof the easy removal of the screen. (See Fig. 104.) The fluorescent screen mentioned above consists of a coating ofplatino-cyauide of barium, spread evenly upon a supporting sheet. Alayer of varnish is caref
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectradiolo, bookyear1910
