Seeing what stories travellers bring back with them about the hawk-like vision of hunting races, one might suppose that such comparisons would be all in their favour.

The Cambridge Expedition to Torres Straits, however, of which Dr.Haddon was the leader, included several well-trained psychologists, who devoted special attention to this subject; and their results show that the sensory powers of these rude folk were on the average much the same as those of Europeans.

It is the hunter's experience only that enables him to sight the game at an immense distance.

There are a great many more complicated tests of the same type designed to estimate the force of memory, attention, association, reasoning and other faculties that most people would regard as purely mental; whilst another set of such tests deals with reaction to stimulus, co-ordination between hand and eye, fatigue, tremor, and, most ingenious perhaps of all, emotional excitement as shown through the respiration--phenomena which are, as it were, mental and bodily at once and together.

Unfortunately, psychology cannot distinguish in such cases between the effects of heredity and those of individual experience, whether it take the form of high culture or of a dissipated life.