208 W. A. Norton on Molecular Physics. 
special circumstances, the exertion of a separating force 
that will ensue, in consequence, upon the next molecule beyon' 
that which receives the ray, must depend upon whether there 18 
an electric conducting connection between the two or not. 
o it 
into a state of positive electrization. The nature of the wee 
oe : : po | - 
united. The action here considered is essentially the same aS 
n 
hat which occurs in the decomposition of water by zinc (p. 251)- 
Most cases of the chemical action of light would seem to be eX- 
‘ thus xplain the action 0 
ight upon an explosive mixture of chlorine and hydrogen, by 
May se eee 
