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direct connection with the problem as stated in words.--Compare No.
1
448, l. 17.]
1
121.
A definition as to why a man who slides on ice does not fall.
Footnote: An indistinct sketch accompanies the passage, in the
[
original.]
On Flying machines (1122-1126).
1
122.
Man when flying must stand free from the waist upwards so as to be
able to balance himself as he does in a boat so that the centre of
gravity in himself and in the machine may counterbalance each other,
and be shifted as necessity demands for the changes of its centre of
resistance.
1
123.
Remember that your flying machine must imitate no other than the
bat, because the web is what by its union gives the armour, or
strength to the wings.
If you imitate the wings of feathered birds, you will find a much
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