24 



VAPOR NUCLEI AND IONS. 



Table io. Nucleation of dust-free air, energized or not. New apparatus, i J- inch 

 stopcock; connections of inch gas pipe. Barometer 76.23 cm. Walls of fog cham- 

 ber 03 cm. thick. Three horizontal wet cloth partitions within chamber. 



dp. 



n x 10- 



A7 x 10- 3 . 



180 

 175 

 175 

 175 



160 

 160 



137 

 62 



I 



6 



17 



46 



60 



92 



125 



160 



160 



136 



440 

 400 

 400 

 400 

 300 

 300 

 235 

 9 



9 



27 



75 



99 



153 



212 



300 



300 



230 



II. Radium tube added on side. Barome- 

 ter 76.05 cm. (Mean values.) 



43-6 

 35o 

 30.8 

 26.4 

 24. 2 

 22.8 

 21.2 

 20.0 

 18.8 

 19.0 

 19.0 

 19.6 

 20.4 

 21.0 



4 

 5 

 5 

 5 

 5 

 5 

 5 

 4 

 o 

 o 



5 

 2.6 



4-9 

 5-2 



40 

 67 

 69 

 64 

 60 



57 

 55 

 20 



o 



o 

 . i 



5-2 



37 

 43 



95 



126 



120 



97 



87 



87 



74 



28 



o 



o 



6. 



5i 

 60 



III. X-rays. D =50 cm. from side. 



48.9 

 43-6 



3 7-6 

 4 8.o 



1 go 

 216 



560 



530 



dp. 



nx io- 3 . 



A/X io- 3 . 



Ill (continued). X-rays. D=5ocm. 

 from side. 



35-2 

 30.8 

 26.6 

 22.8 



21.5 



20.8 



19-5 

 18.6 



18.3 



240 



258 



229 



137 



120 

 100 



39 



1 



?o 



45o 

 440 

 360 

 200 

 170 

 138 



52 

 1 



?o 



IV. X-rays. D = i2 cm. from side. 



2. 

 54 

 "7 

 125 



195 

 290 

 320 

 306 

 240 



3- 



74 

 165 

 180 

 290 

 490 

 610 

 750 

 760 



V. Dust-free air. Fog chamber with 4- 

 sheeted wet cloth. 2 to 3 cm. apart. 

 Barometer 76.36 cm. 



28.8 

 27.0 



25-3 

 25.8 



25-3 

 25.8 



30.8 

 31.6 

 32.3 

 33- 1 

 34-0 



g'BP corona steadily repeated, but not quite clear. 



>wr g 



wyg. 



7 gyog'. 



2 wog. 'GBP. 



wog'. 



4 w P corona. 



9 Vague. 



