Proceedings of the Royal Society of Victoria Volume 17-18

Proceedings of the Royal Society of Victoria Volume 17-18

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1881 edition. Excerpt: ... in the north the winds range from N.W. to N.E., and in the south from S.W. to S.E. This is the normal state of affairs in summer, and all around our coast sea breezes prevail. But now if one of the constantly recurring whirls or cyclonic movements of the atmosphere, forming perhaps at the Cape of Good Hope, or on the ocean between here and there, should approach our western or south-western coast, a change of affairs very soon becomes apparent. In Western Australia, or perhaps first at Cape Borda or Cape Northumberland, the barometer begins to fall, the wind coming from N.E., then increasing from north; then the barometers at Portland, Cape Otway, George Town, Melbourne, Wilson's Promontory, fall in succession with a northerly wind, which increases in force as the pressure gets less; this wind, blowing from an area of higher to an area of lower pressure, although still from around the summer low pressure area of Central Australia, comes down to us heated by the tropical sun, and by travelling over regions of heated earth's surface, producing the hot wind of South Australia and Victoria. These hot winds are always in front of cyclonic movements, and are fully explained by them. As the cyclonic area approaches, moving eastwards, the barometer still continues to fall, while the temperature increases. The question now arises, Where is the centre of this area, and where will it pass? The way the wind shifts tells us of this. So long as the wind is north, the centre is to the west of us; if it shifts from N. to N.W., as is most frequently the case here, the centre passes to the south of us; if it falls calm, with perhaps clear sky and very low barometer, the centre passes over us; but if the wind backs from N. to NE. and E., it...show more

Product details

  • Paperback
  • 189 x 246 x 5mm | 195g
  • Rarebooksclub.com
  • English
  • Illustrations, black and white
  • 1236928350
  • 9781236928351