Salusbury, Thomas, Mathematical collections and translations (Tome I), 1667

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The Figure of the two Ships emptied as they lie, with the other Ship
raiſed up above water.
325[Figure 325]
EXPLANATION III.
But if it ſo fall out, that you cannot on ſnch an inſtant, finde
two Ships of the ſame Bulk with the Ship ſunk, you may take
four ſmaller; provided, that all the four together hold twice
as much burden as the Ship ſunk, and rather more than leſs.
Which
four ſmall Ships being all firſt cleer'd of their lading, and well ſtopt
in all their Skuppers and Portholes (as was ſaid in the two) you muſt
couple them with Beams and good Planks, by two and two, as you
uſe to do with two Lighters, when you would make a Bridge of
them: and theſe two pair of Hoys or Barkes thus coupled together,
you muſt afterwards faſten one pair to another, with ſeven of thoſe
Tires or Rows of thick and ſtrong Beams tripplicated, as was ſaid in
the precedent Explanation; and place them at ſuch a diſtance one
pair from another, as that you may leave berth or ſpace enough for
the ſunk or foundered Ship to riſe between them, and ſome what
more, (as was ſaid of the two.) And though this conjunction of the
two pair of Ships, may be made three ſeverall wayes, yet I will have
you make the two Poops or Hin decks of the one couple, to lie
poſite to the two Poops of the other couple.
And to make this
conjunction, you are to place two Tires of thoſe great Beams along
the upper parts of the ſaid Poops, ſo, that they may reſt in the
ſide on thoſe leſſer Beams and Planks, where with each of thoſe two
pair of Ships were coupled: and each of theſe Orders or Tires of

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