The nucleation of the uncontaminated atmosphere . = = 0; V2+y3 ZS 4- Xi=Z3 Zi 5- Xf> = ZL = =0; yt,+y$ 26 PERSISTENT NUCLEI. 65. In the above charts, Tab. 12 is replacedby the present table 39; Tab. 13, by thepresent table 40; Tab. 14, by the presenttable 41. 2Z 19 ZO WFigs. 63-68.—Illustrating tables 39, 40, 41. 54. Persistent nuclei in general*—It is not improbable that persist-ency may generally be due to some cause favorable to the productionof water nuclei.* Those heavy rains, for instance, which accompanythe X-ray corona when the bulb is close to the fog chamber may bedue to the fact
The nucleation of the uncontaminated atmosphere . = = 0; V2+y3 ZS 4- Xi=Z3 Zi 5- Xf> = ZL = =0; yt,+y$ 26 PERSISTENT NUCLEI. 65. In the above charts, Tab. 12 is replacedby the present table 39; Tab. 13, by thepresent table 40; Tab. 14, by the presenttable 41. 2Z 19 ZO WFigs. 63-68.—Illustrating tables 39, 40, 41. 54. Persistent nuclei in general*—It is not improbable that persist-ency may generally be due to some cause favorable to the productionof water nuclei.* Those heavy rains, for instance, which accompanythe X-ray corona when the bulb is close to the fog chamber may bedue to the fact that condensation occurs spontaneously without theneed of supersaturation, if an exposure to very intense X-light is inquestion. The nuclei in the X-field behave like hygroscopic bodies. *For more detailed statements see my investigation on the Structure of theNucleus, Smithsonian Contributions, No. 1373, 1903. 66 NUCLEATION OF THE UNCONTAMINATED ATMOSPHERE. Table 3g.—Fog limits of fleeting nuclei. Cylindrical fog chamber, without casket. 5a = o, but tested. Exposure to— Distance. S-p. •si. Sl, MXio8. N\ X itr. cm.
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