EFFECT OF PRESSURE UPON ARC SPECTRA. 
147 
Table V. 
Mean values. 
Plate . . 
D19. 
D18. 
D 
25. 
D24. 
fD18. 
D19. 
D24. 
[D25. 
Line. 
o 
Displacements in thousandths of an Angstrom unit. 
M. 
M. 
M. 
e3 
164 
203 
— 
90 
93 
87 
— 
183 
90 
Group III., 
reversed. 
Ratio. 
2-0 
1 
n 
211 
215 
231 
211 
223 
* 
Group III., 
/2 
190 
— 
— 
185 
220 
— 
— 
190 
202 
> reversed and 
/3 
194 
— 
— 
237 
— 
— 
— 
194 
237 
unreversed. 
Totals 
595 
662 
Ratio 
. . . 
09 
1 
3 
267 
280 
159 
121 
142 
157 
155 
274 
146 
a\ 
271 
237 
142 
103 
129 
— 
— 
254 
125 
a2 
263 
226 
— 
86 
129 
103 
142 
246 
116 
- Group II. 
' al 
— 
204 
— 
95 
112 
101 
116 
204 
103 
bO 
233 
181 
— 
91 
99 
97 
— 
207 
95 
J 
Totals . . 
1185 
585 
Ratio 
2-0 
1 
b3 
103 
103 
69 
43 
47 
103 
53 
1 
bl 
99 
121 
60 
60 
60 
— 
— 
110 
60 
dO 
99 
108 
60 
56 
— 
— 
— 
103 
58 
el 
99 
99 
—- 
56 
— 
— 
— 
99 
56 
Group I., 
^ reversed. 
el 
86 
108 
— 
43 
— 
— 
— 
97 
43 
f/3 
90 
112 
— 
60 
47 
— 
— 
101 
53 
i2 
103 
' - 
— 
60 
65 
— 
— 
103 
62 
jo 
90 
95 
— 
52 
65 
— 
— 
92 
58 
J 
Totals . . 
808 
443 
• 
Ratio 
1-8 
1 
The readings given in the columns marked M were made by assistants. 
Numbers in black figures signify reversal. 
u 2 
