INI'IJ 



or mischief, an the case may be. < hi very dry day* 

 Denver the amount of mm.- among adults and of mi*- 

 duct aniMiisj school children increases largely. The 

 nerves seem to become nnstmng by reason of the high 

 to of electric or magnet i. . hy tin- dryness and 



tin- wind. When tin- \\ ind dies down and the air becomes 

 moist, the norvs return to their normal condition, hut 

 til-- system has been through an experience which reduces 

 the power to control emotional impuUcs. We find that 1 

 people in extremely hot, dry countries, like Persia and 

 ( liine>e Turkestan, are highly emotional and seriously 

 lacking ontrol. 



Each kind of climate and the geographical chara- 



f every inhabited region e\ert more or less influ- 

 e upon the industrial life and the social organization 

 of the people. If the plain is wat-rle in summer and 

 the plateau deeply buried in snow in the winter, the ani- 

 mals must migrate. Man finds the region too dry in 

 one part and too cold in another part for agriculture. 



re he must live upon animals, either as a hunt 



or, after he has partially dome ! some species of 



animal, as a shepherd. This leads to a nomadic life, 



which in turn induces habits of cleanliness in eating. 



cling, sleeping, working, and resting. Such habits 



becoming mass phenomena or usages of the group, de- 



P moral standard- oi iousness, hardihood un- 



il ditlicnlties, la/.iness, hospitality, and the li 



physical features mold the people. Oeogrnph- 



nnient has an important influence upon the 



forms of invention. Protection airainst exposure is at- 



-d in accordance with the available materials; for 



inw house of the Kskimo. the hark wigwam 



of the Indian, and the cave dwelling of the tribes of the 



