OUT-DOOE STUDIES IN AUTUMN 



19 



It is a fact generally becoming recognised, that for the solution 

 of many of Nature's most difficult problems, we must look to the 



FIGURE 19. Barn Swallows returning in pairs and landing 

 on the Isle of Wight. 



labours of the field-naturalist rather than to work which is confined 

 to the laboratory or museum. 



