It is calculated that the body requires certain proportions of fat,
carbohydrates and proteins to do certain work under certain conditions:
but just what the absolute quantities are is not ascertained. The work of
the Polar Party was laborious: the temperatures (the most important of
the conditions) varied from comparative warmth up and down the glacier to
an average of about -20 deg. in the rarefied air of the plateau. The
temperatures met by them on their return over the Barrier were not really
low for more than a week, and then there came quite commonly minus
thirties during the day with a further drop to minus forties at night,
when for a time the sun was below the horizon. These temperatures, which
are not very terrible to men who are fresh and whose clothing is new,
were ghastly to these men who had striven night and day almost
ceaselessly for four months on, as I maintain, insufficient food. Did
these temperatures kill them?
Undoubtedly the low temperatures caused their death, inasmuch as they
would have lived had the temperatures remained high. But Evans would not
have lived: he died before the low temperatures occurred. What killed
Evans? And why did the other men weaken as they did, though they were
eating full rations and more? Weaken so much that in the end they starved
to death?
I have always had a doubt whether the weather conditions were sufficient
to cause the tragedy.
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