EFFICIENCY OF FOG CHAMBER. 



39 



Table 14. Nucleation of dust-free air, energized or not, at different supersaturations. 

 Plug gas cock, 2 inches ; piping 1 \ inches in diameter, 2x6 inches long. Long intervals 

 between observations. 



dp. 



Corona. 



n Xio" 



I. Non-energized air. 1 



gyobg 



w y b g 



wyg 



wrg 



wrg 



wBP 



cor 



cor 



II. Non-energized air. 1 



cor 



cor 



cor 



cor 

 wrg 

 gBP 

 gBP + 

 w r o g 

 wcg 

 wrg 

 wyg' 



III. Non-energized air. 



w r o g 

 w r o g 

 w r o g 

 w y b g 

 w y b g 

 w y b g 



gyo 

 gyo 



w y b g 

 wrg 



460 

 420 

 400 

 260 

 108 



69 

 4- 



17 



1.8 



2 



6 



46 



92 



139 



147 



290 



230 



260 



400 



290 

 290 

 290 

 400 

 400 

 420 

 490 

 470 

 420 

 290 



IV. X-rays at D = 20 cm. from side. 



gBP 

 gBP 

 gBP 

 gBP 

 gBP 



460 

 480 

 470 

 460 

 430 



dp. 



Corona. 



nXio 



3 



IV (continued). X-rays at D= 20 cm. 

 from side. 



gyo 

 gyo 



wyg' 

 w o g 

 gBP 

 gBP 



w o g 



w o g 



gBP 



cor 



380 



360 



320 



250 



440 



410 



120 



250 



250 



120 



30 



o 



o 



IV. X-rays. D = 10 cm. 



3 gB 



gB 



gB 



gB 



gB 



gB 



gB 



gB 

 4 gB 



gyo 



w o g 



w o g 



cor 



cor 



480 

 5io 

 500 

 47o 

 460 

 450 



430 

 410 

 400 

 320 

 250 

 100 

 21 



i-3 



V. Air 5 energized by radium, D =0, on 

 side. 



cor 

 cor 

 cor 

 cor 

 cor 

 cor 

 cor 

 cor 

 cor 

 cor 



87 

 95 

 92 

 79 

 78 

 79 

 85 

 68 



33 

 2. 



'In neither series I or II were stops provided for the exhaust cock. This is the case in series III, etseq. 



2 Filter open 90 without danger. Evaporated corona shows = 7.6. 



'Coronas at first stone-blue and irregular, soon becoming gBP. 



Clear gB P at once. 



For air, 8= 9.9 w o g. tiX 10- 3 = 290. Large coronas fall out, leaving a smaller one behind. 



