lines of calcium occur have been used to test the conclusion, and all show a shift to the red end; the mean of the shifts corresponds to a velocity of + 6.3 kms. per sec.
The results of this discussion have been formulated by Dr. Freundlich thus:—
SUMMARY
1. Statistical consideration gives us the means of separating the mean gravitational effect from the ordinary Doppler effect in the case of the helium
-stars and the bright
- and
