7 2 4 



POPULAR SCIENCE MONTHLY. 



been much freer from ethnic interference, especially in the early 

 days when navigation across seas was a hazardous proceeding. 

 Only in the extreme south do we have occasion to note racial 



6ROAD HEADS 

 871 



WHITE LINES ARE 

 BOUNDARIES OF 

 COMPARTIMENTI 



CEPHALIC INDEA 



ITALY- 



^94^71 OBSERVATIONS 

 AFTER. LlVl. '% 



invasions along the coast. The absence of protected waters and 

 especially of good harbors, all along the middle portion of the 

 peninsula has not invited a landing from foreigners. Open water 

 ways have not enabled them to press far inland, even if they 

 disembarked. These simple geographical facts explain much in 

 the anthropological sense. They meant little after the full de- 

 velopment of water transportation, because thereafter travel by 

 sea was far simpler than by land. Our vision must, however, 

 pierce the obscurity of early times before the great human inven- 

 tion of navigation had been perfected. 



