ABSORPTION OF LIGHT IN GASEOUS MEDIA. 
403 
Table I. 
Wave¬ 
length in 
microns, 
A. 
Mean 
solar 
intensity, 
S. 
Per¬ 
centage 
probable 
error. 
Mean coefficients of atmospheric transmission, e~ 
AVashington, 
1902-07. 
Mount AATlson, 
1909-10. 
Mount AATiitney, 
1909-10. 
c... 
c.. 
e~^‘. 
c.. 
0-30 /X 
(440) 
(0-510) 
(-691) 
0 • 32.5 
1285 
30- 
— 
— 
0-(550) 
(-598) 
0-584 
•538 
0-35 
2700 
7-3 
— 
— 
0-612 
•491 
0-660 
•416 
O'.37 5 
3464 
2-7 
— 
— 
0-662 
•412 
0-738 
•304 
0-39 
3620 
1-7 
0 • 445 
-810 
0-694 
•365 
0-763 
•270 
0-42 
5261 
1-3 
0-586 
-534 
0-764 
•269 
0-806 
•216 
0-43 
5340 
1-7 
0-600 
-511 
0-778 
•251 
0-822 
•196 
0-45 
6047 
1-4 
0-640 
-446 
0-800 
•223 
0-851 
•161 
0-47 
6253 
1-8 
0-671 
-399 
0-827 
•190 
0-880 
•128 
0-50 
6064 
1-9 
0-705 
-350 
0-858 
•153 
0-900 
•105 
0-55 
5627 
2-1 
0-739 
•302 
0-876 
•132 
0-918 
•0866 
0-60 
■ 5047 
2-1 
0-760 
-274 
0-890 
•117 
0-934 
-0683 
0-70 
3650 
0-4 
0-839 
-176 
0-942 
•0597 
0-956 
•0450 
0-80 
2672 
1-2 
0 - 865 
-145 
0-964 
•0367 
0-972 
-0284 
I-00 
1664 
0-7 
0-901 
-104 
0-973 
•0274 
0-980 
•0202 
1-30 
897 
0-7 
0-916 
-0876 
0-972 
•0284 
0-980 
•0202 
1-60 
526 
1-4 
0-930 
-0726 
0 - 975 
•0253 
0-978 
•0222 
2-00 
245 
2-4 
0-909 
-0943 
0-957 
•0439 
0-940 
•0619 
2-50 
43 
4-8 
0-870 
-.139 
0-(900) 
(-105) 
0-930 
•0726 
3-00 
(12) 
45 ■ 
— 
— 
— 
— 
0*910 
•0943 
Mean transmission coefficients for Potsdam. 
A. 
c.. 
A. 
6'-W 
C 
•44/x 
0-706 
•348 
• 58/x 
0-830 
•186 
•46 
0-740 
•301 
•60 
0-840 
•174 
•48 
0-764 
•269 
•62 
0-850 
•162 
•50 
0-781 
•247 
•64 
0-861 
•150 
•52 
0-795 
•229 
•66 
0-871 
•138 
•54 
0-808 
•213 
1 -68 
0-881 
•127 
•56 
0-819 
•200 
Coefficients of Attenuation for Washington, Mount Wilson, Mount JFhitney, and Potsdam, 
3 F 2 
