The perches are long pieces and of different thickness of pine wood of the North, and that are the most suitable for lathing, and particularly for the composition of majors poles and yards of the warships.
The weight of the four main sticks of a ship or frigate is by approximation two-thirds of all the rigging, including the part of respect.
The center of gravity of a major mast of English construction is soon to be half the full length. But if it is done to the Spanish, this center is 1/26 more towards the coz, than half.
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