OF VALUE. 
125 
« If with the same quantity of labour, a less 
quantity of fish, or a greater quantity of game 
were obtained, the value of fish would rise in 
comparison with that of game. If, on the con- 
trary, with the same quantity of labour a less 
quantity of game, or a greater quantity of fish 
was obtained, game would rise in comparison 
with fish. 
«If there were any other commodity, which 
was invariable in its value, we should be able 
to ascertain, by comparing the value of fish 
and game with this commodity, how much of 
the variation was to be attributed to a cause 
which affected the value of fish, and how much 
to a cause which affected the value of game. 
« Suppose money to be that commodity. If 
a salmon were worth £1, and a deer £2, one 
deer would be worth two salmon. But a deer 
might become of the value of three salmon, for 
more labour might be required to obtain the deer, 
or less to get the salmon; or both these causes 
might operate at the same time. If we had 
this invariable standard, we might easily as-