332 W. A. Norton—Molecular and Cosmical Physics. 
spherical layer of atoms comprised within the cone. The entire 
wave-force conveyed to m will be the sum of the individual 
y 
another of the extent ab, posited at the distance ma; and thus 
m should then be enormously great, even if the impulses 
emanating from the individual ethereal atoms be very feeble. 
Now, for every wave transmitted to m, a certain minute frac- 
tion of the impulsive force conveyed in it, in the extent of the 
atom m, will take effect as an impulse against this atom. The 
the waves transmitted from the ether lying within c’md’. 
. Hye 
m, then receives a certain impulsive action from the ethereal 
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