ON COLOUR PHOTOMETRY. 
5G1 
Table XI.—Relative Luminosities of Rays. 
I. 
II. 
III. 
IY. 
V. 
VI. 
Scale 
Wave- 
Diff. abscissae 
Tan. of incli- 
Tan. x 
Luminosity 
number. 
lengths. 
Diff. ordinates 
nation. 
28-2 or 5-03. 
of normal curve. 
563 
6358 
50-20 
62-42 
1-5 
42-3 
43-5 
50-6 
5889 
180-40 
58-18 
3-5 
98-6 
99-5 
46'3 
5618 
180 
57 
316 
88 
88 
393 
5246 
135-45 
76-18 
1-55 
43-7 
44" 5 
35-3 
5066 
75-25 
80-15 
•77 
21-7 
20-2 
333 
4975 
105 
48—4 
2-39 
12 
12 
29-3 
4822 
50 
66-15 
•96 
4-9 
5 
19-3 
4497 
10 
80 — 50 
•33 
1-68 
1'5 
- 
I 
4 c 
MDCCCXCII.—A. 
