The mean directions and velocities of wind were found and drawn 

 in vectorial form in Figs. 1-4. One resultant wind vector, which has 

 been drawn as an arrow, corresponds to each wind rose. The number 

 attached to each vector indicates the region by the five-degree square, 

 and the magnitude and. direction of resulting velocities has been 

 tabulated in table I according to this number. 



Table I 



Assuming that the air current is the same throughout the lowest 

 1 km. layer, th'e total amount of mean monthly air transport (per second) 

 into the Continent of Australia was found to be as follows : — 



Under the assumptions described above, the net air-flow into the 

 Continent of Australia in January, April, July, and October is estimated 

 roughly, as 16 x 10^ m. Vsec, 0-86 X 10^ m.Vsec, — 16 X lO^m.Vsec, 

 and 0-64 x 10^ m.^/sec. respectively. The net air-flow out of the 

 Continent of Australia in July explains the predominant descending 



108 



