. An Investigation of the Heavy Constituents of the Atmosphere. Flg. 4. the usual manner, and the rare gas obtained added to the main supply. Thelatter was fractionated in the following manner :— r-4 1 2 r-6- L-3 f-8 (argon) -9-i plO (argon 4- krypton) -ll-i [-14 (krypton + argon)—I 15 (krypton) L16 (krypton + xenon) r -?! 12 (xenon + krypton) L13 (xenon) The main body of the gas constituted fractions 13 and 15, fractions 10, 14,16, and 12 occupying only a few cubic centimetres each. The volume ofthe krypton was 50 , and that of the xenon 220 The second methodof extracting the heavy ra
. An Investigation of the Heavy Constituents of the Atmosphere. Flg. 4. the usual manner, and the rare gas obtained added to the main supply. Thelatter was fractionated in the following manner :— r-4 1 2 r-6- L-3 f-8 (argon) -9-i plO (argon 4- krypton) -ll-i [-14 (krypton + argon)—I 15 (krypton) L16 (krypton + xenon) r -?! 12 (xenon + krypton) L13 (xenon) The main body of the gas constituted fractions 13 and 15, fractions 10, 14,16, and 12 occupying only a few cubic centimetres each. The volume ofthe krypton was 50 , and that of the xenon 220 The second methodof extracting the heavy rare gases is therefore nearly as economical, as far asxenon is concerned, as the first, but from %nq times the amount of air onlyone-sixth the volume of krypton was obtained. The second method, however,involves very much less labour, and was the better of the two considering theobject of the work. Kamsay has shown* that the proportion of krypton inthe air, by volume, is 1 part in 20 millions, and thatof xenon 1 part in * Eoy. Soc. Proc.,5 vol. 71, p. 422,
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