94 
from the group. The results will be awaited with great interest 
by all scientists. 
o 
[Note added 9th September, 1919. — Reports to hand indicate 
that the eclipse was observed under fairly favourable conditions. 
The astronomers are, however, waiting on to obtain photographs 
of the same stars after the sun has moved away from these stars. 
By thus having the two sets of photographs taken with the same 
instruments in the same positions, possible instrumental errors will 
be reduced to the lowest minimum.] 
[Note added 17th January, 1920. — At the joint meeting of the 
Royal and Royal Astronomical Societies held in London on 6th Nov- 
ember, 1919, the Astronomer-Royal (Sir Frank W. Dyson) an- 
nounced that the eclipse observations supported Professor Einstein’s 
hypothesis. One of the Sobral cameras and that used at Principe 
—both of which produced sharp photographs — gave about l.S 
seconds of arc as the distortion of rays of light at the sun’s edge. 
The second Sobral camera, despite its unsatisfactory performance, 
indicated a distortion greater than 0.8 seconds. The only other 
practical tesl of Einstein’s theory which has been suggested, but not 
yet confirmed, is a displacement of spectral lines towards the red 
in the spectrum of a luminous body of great gravitative power.] 
