. The London, Edinburgh and Dublin philosophical magazine and journal of science. 462, Aug. 2,1907. Production of Cathode Particles by Rontgen Radiations. 321 was finally absorbed completely in a thick brass disk Ewhich served as electrode. The cathode particles whichemerged from E were absorbed by a layer of paper gummedon the surface of E, and so contributed nothing to theionization in the region ER. Another portion of the radiation, travelling at right anglesto the plane of the paper, entered an electroscope (to bereferred to as the primary electroscope) which served tostandardize the amoun
. The London, Edinburgh and Dublin philosophical magazine and journal of science. 462, Aug. 2,1907. Production of Cathode Particles by Rontgen Radiations. 321 was finally absorbed completely in a thick brass disk Ewhich served as electrode. The cathode particles whichemerged from E were absorbed by a layer of paper gummedon the surface of E, and so contributed nothing to theionization in the region ER. Another portion of the radiation, travelling at right anglesto the plane of the paper, entered an electroscope (to bereferred to as the primary electroscope) which served tostandardize the amount of homogeneous radiation emitted bythe radiator. As the quality of the homogeneous radiation is unaffectedby small variations in the bulb, and as the quantity of radiationentering the chamber A is always the same fraction of thatentering the primary electroscope, no discordance in theresults can arise from slio-ht variations in the bulb. Apparatus. A cylindrical brass ionization vessel was constructed withan internal diameter of 11 cms. (fig. 2). A circular opening, Fier. to h^, C*l» tvbc,&»!-» JrHj inlets 7 cms. in diameter, was made in the bottom, and a piece ofcopper gauze was fitted into this opening and carefullysoldered round the edges so as to be quite flush with thebottom of the vessel. The details of this arrangement areshown in fig. 3. A cap CO was then cast in brass and Fig. 3. S3\d turned down to fit tightly over the bottom BB. The capwas made with a circular opening of the same size as that inBB. A sheet of thin parchment w<is used to cover the Cugauze : its weight was equivalent to that of 005 mm. of Al. 322 Mr. R. T. Beatty on the Production of Cathode Parchment was found not to be air-tight, and after sometrials the method of treating it which gave most satisfactionwas to plunge it in boiling paraffin wax, and then removethe excess of wax between filter-papers. This treatmentincreased the weight of the paper to that of 01 mm. of
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectscience, bookyear1840
