434 
CAPTAIN ABNEY AND MAJOR-GENERAL RESTING 
R+G + V =250 
(R + G)+V =250-0 
(R+V)+G =252-5 
(G+V)+K =248-0 
(R+G +V)=250-0 
„ =250"25 by method of least squares. 
A measurement of the red and green was taken on the following day, the position 
slits in the spectrum not having been altered. 
Observed. 
Least squares. 
R + G 
238 
239 
G 
38 
37 
R 
203 
202 
The slit of the spectroscope was then opened, and measurements of the same rays 
made as follows :— 
Observed. 
Least squares. 
R+G 
904 
903-3 
R 
760 
760-7 
G 
142 
142-6 
It will be observed that in all these cases the relative proportions of red and green 
are the same within very close limits. 
The slit card was then reversed, and the slits placed in other parts of the spectrum. 
The following results were obtained :—- 
Observed. 
Least squares. 
R 
19 
19-9 
G 
130 
131-19 
V 
7-5 
7-32 
R + G 
151-0 
150-38 
g+y 
140-0 
138-51 
R + Y 
27-0 
26-51 
r+g+y 
156-0 
157-70 
Combining the observed results as before we get : 
