414 On the Cyclones of Tasmania, cc. 
This exactly describes the passage to the eastward of the 
northern portion of a Cyclone, with the pyramidal seas 
caused by the interference of the superimposed ridges at 
the central area. 
Colonel Reid has shown that the gales in the neighbour- 
hood of Cape Horn are probably produced by Cyclones 
passing to the eastward, so that there seems reason to 
believe that Cyclones pass from South Australia across the 
whole breadth of the South Pacific Ocean. In the voyage 
of Captain Weddell towards the South Pole (1822-8) occur 
several instances of gales shifting “ from N.N.W. to S.W., 
and leaying a most distressing sea.” When off James Island, 
New South Shetland, in 62° 52’ S. and 62° 80’ W., they 
experienced a severe hurricane, in October 1828. On the 
26th October, A.M., wind shifted to North and weather 
became foggy, and soon after freshened from N.W. to such 
a degree as to oblige them to take in the foretopsail, and it 
was with difficulty they obtained an offing. On the 27th a 
great westerly swell; at midnight a gale at West. At 8 a.m. 
of the 28th the wind shifted suddenly into the 8.W., and 
increased to acomplete hurricane. Sail reduced to the size 
of a mere napkin, and cold intense. In consequence of the 
wind haying shifted, the sea ranged on board on the lee-side, 
sweeping everything before it. The gale continued with 
great violence from the 8.W. by 8. On the morning of 
the 29th it moderated, and afterwards continued at S.S.W. 
Lay-to ; many ice-islands rolling with the noise of an earth- 
quake. 
This Cyclone was clearly moving towards the E.S.E. 
When we see a vessel near a dangerous and desolate coast, 
surrounded by huge icebergs, and on the point of being 
involved in a furious hurricane, we cannot fail to be forcibly 
reminded of the value of a science which would enable her 
