. American X-ray journal . s arethe same. It is an apparatus whosefunction is to accumulate by induction alarge or small amount of electricity, de-pending upon the capacity of particularinstrument, on a comparatively smallsurface, and in short space of time. Wemay effect certain results with the con-denser through the instrument uponwhich it is devised to act or utilize toabsorb or divert what mav be termed THE AMERICAN X-RAY JOURNAL. 107 I waste electricity, the surplus energyand obviate the spark at the contactpoints in connection with our coil. Toincrease the capacity of an adjustableconden
. American X-ray journal . s arethe same. It is an apparatus whosefunction is to accumulate by induction alarge or small amount of electricity, de-pending upon the capacity of particularinstrument, on a comparatively smallsurface, and in short space of time. Wemay effect certain results with the con-denser through the instrument uponwhich it is devised to act or utilize toabsorb or divert what mav be termed THE AMERICAN X-RAY JOURNAL. 107 I waste electricity, the surplus energyand obviate the spark at the contactpoints in connection with our coil. Toincrease the capacity of an adjustablecondenser plugs are inserted, to de-crease the same the plugs are illustration in May issue of thisJournal. and by varying the intensity of the cur-rent we have to understand the amountbeing expressed in so and so many am-peres, volts at certain time. But suchdata of pressure and quantity of currentgiven theoretically are quite worthlesswithout the knowledge of the number ofthe interruptions of the coil or the static. Electrical Conde iser. Fig. 2. INTERRUPTER LESSON VII. With the advancement of the x-raytechnic the desire arose for knowl-edge to determine the conditions underwhich skiagraphs of the thicker parts ofthe body may be successfully taken—one of such conditions being the knowl-edge of the number of interruptions inour current used for generating the x-rays. As stated already, we can varythe number of particles in the vacuumtube by expelling gas from anode, or bya regulator which liberates, by the ac-tion of current upon a chemical, arti-ficially gas. We can expel gas fromanode by introducing a variable ca-pacity discharge in anode end of thetube, and in this way lower vacuum, andby capacity discharge in cathode endand no discharge in anode end of thetube, may raise vacuum. By the regu-lation of these two capacities we canmaintain the vacuum at a certain degree, machine. To beginners, especially inthe branch of x-ray technic, the in-terrupter will prove to be
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