404 Scientific Intelligence. 
account of the small deformation of the solar disc, when the moon 
encroaches upon it. With the revolver one can obtain a series of 
negatives can be examined at leisu graphs also 
can be used to determine the relative position of the two heavenly 
bodies at the different intervals of time, by this means check 
ecul however, a gaseous envelope of considerable 
size interposes itself, it will act under the most favorable condi- 
The exist- 
tion was employed on the occasion of the late eclipse at Marseilles. 
Some solar photographs 0™-°30 in diameter were taken. These 
and allo 
measurements of the heights of these inequalities.— Comptes 
Rendus, No. 6, 1879, p. 340. 3% 
9. Density of the light Ether.—Herr P. Guan criticizes the con- 
clusions of Sir William Thomson that the mass M of a cubic foot 
of ether is greater than a pounds, where g is the gravitation 
constant, V the velocity of light, and » the ratio of the greatest 
velocity of a rotating ether particle to the velocity of light. re 
value of » taken by Thomson is ;1, and the resulting value of M 
<4 
} 
5 
3 
® 
& 
oO ° 
all 
=, 
et. 
® 
=a 
a 
Oo 
5 
a] 
sions Pp 
through the ether of space must tend to separate the et 
