I beg to state my dray did not upset this time, though the centre of
gravity fell far without the base: what Newton says on that subject is
erroneous; so are those illustrations of natural philosophy, in which a
loaded dray is represented as necessarily about to fall, because a
dotted line from the centre of gravity falls outside the wheels. It
takes a great deal more to upset a well-loaded dray than one would have
imagined, although sometimes the most unforeseen trifle will effect it.
Possibly the value of the contents may have something to do with it; but
my ideas are not yet fully formed upon the subject.
We made about seventeen miles and crossed the river ten times, so that
the bullocks, which had never before been accustomed to river-work,
became quite used to it, and manageable, and have continued so ever
since.
We halted for the night at a shepherd's hut: awakening out of slumber I
heard the fitful gusts of violent wind come puff, puff, buffet, and die
away again; nor'-wester all over. I went out and saw the unmistakable
north-west clouds tearing away in front of the moon.
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