EFFECT OF PRESSURE UPON ARC SPECTRANICKEL. 



239 



TABLE IX. (continued). 



The following abbreviations are used to express the width of bright lines and of reversals in columns 8 

 and 9 : s = slight, m = moderate, c = considerable, g = great, vg = very great, G = very very great. 



Other abbreviations are : r = reversed, r a = reversal nearly symmetrical, r v = reversal on violet side 

 of centre of bright line, b, = broadening nearly symmetrical, b r = broadening greater towards red, 

 b v = broadening greater towards violet, V - line has vanished under pressure. 



2 I 2 



