Outlines of a mechanical theory of storms : $b containing the true law of lunar influence, with practical instructions to the navigator, to enable him approximately to calculate the coming changes of the wind and weather, for any given day, and for any part of the oceanBassnett, Thomas
Science
Outlines of a mechanical theory of storms : $b containing the true law of lunar influence, with practical instructions to the navigator, to enable him approximately to calculate the coming changes of the wind and weather, for any given day, and for any part of the ocean
Bassnett, Thomas
Weather
In 1848, Sir James Ross was sent out with the first relief-ship; but was
not able to reach the entrance of Wellington channel because of compact
ice from there to Leopold Island. This was about the beginning of
September--a time when the northern channels are usually the most open.
On the 11th, they ran the ships into Port Leopold, and the next day the
ice shut them in for the winter. From the character of the season, we
may infer that if Franklin did not enter Wellington channel in 1847, as
is most probable, neither did he in 1848. Perhaps he was not able to get
his ships far to the westward, as we infer from the theory. Still, as
the time was not very protracted, he would wait patiently another season
and husband his resources.
In 1849, Sir James Ross cut his ships clear of the ice August 28th, and
crossed over to Wellington channel, where he found the land-ice still
fast, showing that this season was also a bad one in accordance with the
theory. On the 1st of September he met the first gale of wind, at which
time the _Inner Vortex_ was at its extreme north latitude, and rapidly
extending its limits by the motion of the perigee.
This vortex describes a smaller orbit than either the central or the
outer vortex, and consequently reaches into higher latitudes. But the
time was badly chosen, as the whole series of years since Franklin left
has been unfavorable for the early rupture of the ice. Sir James Ross
having been drifted out of Lancaster sound by the gale, finally bore up
for England towards the close of September 1849.
Public-domain text, read in full here on John Shaqi.
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