EXCHANGE. 391 



beer presented by one to another are by and by to be bal 

 anced by equivalent pots; for treating proceeds upon this 

 tacit expectation. We have here, indeed, a curious case, in 

 which no material convenience is gained, but in which there 

 is a reversion to a form of propitiation from which the idea 

 of exchange is nominally, but not actually, excluded. 



Moreover there still survives among the least-developed 

 members of the community, namely, boys, the original 

 practice under the name of &quot; swopping &quot; a practice occa 

 sionally followed by adults, though adults of the lower 

 classes. 



125 



