TYPES. 



97 



marks their centres, and the rains come chiefly from the low 

 pressures between each pair of anticyclones, and the strong 

 westerly gales are but part of the circulation about these high 

 pressures. (See Charts 29 and 30.) 



The one selected for illustration occupied the whole of Australia 

 on June 4th, 1895, Chart 36. Its form was remarkably sym- 

 metrical, and in the central area the barometers read 30 - 6, which 

 is somewhat unusual, hence the circulation is active, and in 

 northern Australia where the trade wind adds force, it is very 

 strong. Under the central influence of these great anticyclones 

 the whole of Australia enjoys fine weather. 



TYPES 



9' 

 AUSTRALIAN WEATHER 



N36 



TYPE XIX. SQUARE HEADED A DEPRESSION. 



This type is a variation of the usual \ depression, but is 

 sufficiently characteristic to be placed by itself as a type or rather 

 a sub-type. Its isobaric peculiarity, as may be seen by refer- 

 ence to Charts 37 and 38, is that there is a flat top or square 

 head to the isobars of the \, the usual form of which is a sharp 

 and regular curve, and the marked feature of this is that under 

 it the weather is remarkably squally and charged with thunder 



