Contents xvii 



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attention to similarities or homologies in the features 

 of the Earth's surface analogous to the well known 

 anatomical homologies in the bodies of animals of 

 different types and classes. 



Louis Agassi z introduced the idea of geographical 

 homologies. 



The subject was further developed by Oscar Peschel. 



Terrestrial homologies divided into two classes: 

 namely, tectonic and meteorologic homologies . . 88 



I Examples of tectonic homologies: the similarity in 

 form of the continental masses of the land on the globe; 

 the grouping of the enclosed seas in an equatorial belt 

 round the globe and the occurrence of the greatest 

 oceanic depths to the northward of those seas. 



The meteorologic homologies depend on the inter- 

 action between the land, sea and air under the influence 

 of the solar energy and the planetary status of the 

 Karth, and are manifested in homologous regions of the 



sea and land 89 



R6sum6 of the characteristics of the climate of the 



globe. The prime cause of climate is radiation from 



the sun and into space. The sensible effect of the sun's 



lepends on the nature of the substance which they 



the air is hardly warmed at all ; the sea is warmed 



nid the surface of the land is heated 



Hence, one reason why the distribution of 



mil land modifies climate ..... QO 



General scheme of the winds of the globe: Prevailing 



westerly winds on the polar sides of the fortieth parallels 



titude: on the equatorial sides of these parallels 



winds blowing from higher to lower 



latitude-; and the monsoons blowing from lower to 



tin- temperature of" the air incre 



.parity for absorbing moisture increases also; 

 therefore th<- trade \\m<i- are drying and e\l, 



winds As tl, th- an - 



Capacity tor moisture diniin: itmated 

 the monsoons are the: nn^ 



and depte-sin^' um .... .91 



In their passage over continental lands the trade- 

 i, r e areas and deserts. They 

 also produce relatively dry pla 

 areas the oceans corre- 



