66 



PRINCIPLES OF STRATIGRAPHY 



Position 



of 

 mouth 



of 

 river 



River 



Drainage 



area 



in 



square 



miles 



Annual 



rainfall 



in 



cubic 



miles 



Mean 



annual 



discharge 



in cubic 



miles 



Mean 

 ratio 



o°-6o° N. 



40°-50° N. 



30°-40° N. 



2o°-30° N. 



IO°-20° N. 



o°-io° N. 

 Equator 

 o°-io° S. 



20°-30° S. 

 30°-40° S. 



Rhine 



Oder 



Niemen 



Vistula 



St. Lawrence . . 



Danube 



Po 



Volga 



Seine 



Rhone 



Dnieper 



Loire 



Dniester 



Yang-tse-kiang 

 Hoang-ho. ... 



Nile 



Pci-ho 



Mississippi ... 

 Rio Grande . . . 



Indus 



Ganges 



Magdalena . . . 



Irawadi 



Kistna 



Godavery .... 



Orinoco 



Amazon 



San Francisco. 



Congo 



Orange 



Olifant 



De la Plata . . . 

 Uruguay 



Total . . 



32,600 



51,100 



36,450 



65,800 



565,200 



320,300 



27,100 



592,300 



23,250 



34,850 



197,450 



42,600 



30,950 



689,100 



387,150 



,293,050 



65,000 



,285,300 



232,300 



360,050 



588,450 



92,900 



181,950 



81,300 



154,850 



429,700 



,229,900 



212,900 



,540,800 



267,150 



14,300 



994,900 



151,000 



13,272,000 



19.500 

 14.700 



10.355 

 19.908 



338.967 



198.736 



23.887 



152.384 

 10.266 

 22.439 



56.384 



18.210 



8.792 



408 . 872 



117. 711 



892. 120 



22.354 

 673.064 

 113-655 

 104.416 



548.791 



116.746 



1 80 . 849 



61 .025 



95 924 

 603 . 397 



2,833.830 

 218.459 



1,213.044 



50.913 



2.472 



904.687 



130.890 



2.500 



3 783 



5 657 



87.312 



67.511 



13.322 



43 • 736 



5 469 



14.066 



22.195 



7.810 



3-274 



125-043 



28.591 



24-334 

 1.650 



125.603 

 12.676 

 26.032 

 43 - 263 

 59-451 

 82.299 

 14.766 

 16.841 



122.242 



527-951 

 22.197 



419.291 



21.875 



0.679 



188.740- 

 32.136 



10,186.460 



2,182.485 



.049 

 .803 



■737 

 .508 

 .904 

 .746 

 1-794 

 3-484 

 1.877 

 1.724 

 2.527 

 2.332 

 2.685 

 3-421 

 4-159 

 36.998 



13-551 

 5-446 

 8.966 

 4.886 



16. 169 

 1.964 

 2.256 



4-137 

 5-708 

 4-936 

 8.009 

 9.842 



3-213 

 2.327 



3-639 

 6.091 



4 073 



Influence of Winds and Topography on Rainfall. Winds 

 blowing from higher to lower latitudes, /. c., from cooler to warmer 

 regions, have their capacity for moisttire increased and hence be- 

 come drying winds. This is ilkistrated by the trade winds, which 

 take up moisture from the oceans and the lowlands over which 

 they blow. The Sahara, parts of Asia, and large parts of Aus- 



