Between is used most often with two things only, but still it is frequently used in speaking of several objects, some relation or connection between two at a time being implied.
Among is used in the same way as amid (though not with exactly the same meaning), several objects being spoken of in the aggregate, no separation or division by twos being implied.
Examples of the distinctive use of the two words:—
Two things.
The contentions that arise between the parson and the squire.—Addison.
We reckoned the improvements of the art of war among the triumphs of science.—Emerson.
Examples of the looser use of between:—
A number of things.
Natural objects affect us by the laws of that connection which Providence has established between certain motions of bodies.—Burke.
Hence the differences between men in natural endowment are insignificant in comparison with their common wealth.—Emerson.