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round in water it would very soon form a hole like that 
above described. 
He (Mr. Binney) wished geologists to examine carefully 
all the surfaces of rocks in situ under the Till, especially 
those containing hollows with gravel or stones in them, 
which might come under their observation, and not only 
record the forms of the holes, but also the shape of the stones 
found in them. 
“On some of the Conditions of Molecular Action,” by 
Arthur Ransome, M.B., M.A., Cantab. 
The scope of this paper was restricted to the action of 
different substances upon one another through the interven- 
tion of purely molecular forces or affinities. 
The following propositions probably include what is 
known of molecular force : 
1. That it depends essentially upon the elementary 
nature of bodies. 
2. That it acts without regard to mass. 
3. That it increases inversely as the distance at some 
enormous ratio. 
4. That its action is affected by calorific, electric, and 
probably by luminous vibrations, and by chemical 
affinity. 
5. That it does not seem to differ, in kind, from the 
attraction of cohesion, which binds together the 
particles of the same substance. 
6. That chemical affinity may be similar in kind, but 
that it differs from molecular attraction in the 
power of produ cing combination. 
When molecular operations take place between the 
particles of bodies of dissimilar chemical composition, the 
following conditions are found to favour the production of 
molecular and chemical changes : 
