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110.

            DISCOURS II
  of ye force of pipes of a conduit and [[?]]
   of ye thickness wch they ought to have
      according to their matter and ye
        height of ye reservatory.

[[image:  drawing of a weight C suspended from a beam I L, in a compound harness of rope, wooden shaft A D B bulbous on each end, and rope (dotted line on A B at D.]]

  When ye reservatorys are very heigh or there is made a conduit of water from very heigh place, ye pipes of ye conduit are often in danger to be broken principally if ye conduit is made thrô deep valleys; and thes is very tormenting if after we have been at great cost some of ye pipes broak it is by ye fault of ye sodder of the feebleness of ye pipes:  We would also avoid employing too much lead or copper to give great thickness to pipes when lesser suffice, here is what we have observed about this matter

  Solid and firm bodys resist their being broken by their small tyes and tanglings of their particles one with another, there are some matters easy to be broken as ice, and other difficultys as iron, marble &c.

  We call that ye absolute resistance of a solid to be broken wch is drawn to tear or break it:  So if we hang ye cylinder of wood A B, by cords to a beam by means of its gross head A, and that we hang towards its base B with cords a weight C of 1000 pounds wch may break ye cylinder towards D or heigher or lower by disjoyning and seperating its interlaced parts, we say that its absolute resistance is of 1000 pounds.  After ye same manner we may know ye resistance of a small band of paper, if we make 2 rings passing to ye band, and running thrô ye rings towards I and L two sticks G H, M N:  Having suspended at the stick M N the weight O by the cords K and Z if that band is broken as in P precisely by that weight then it shall be 4 pounds we say that the absolute resistance of that band is 4 pounds.

[[image: drawing of weight O hanging by a cord K Z from horizontal beam M I N, suspended on a vertical shaft L P I from another beam G L H.]]

Transcription Notes:
mandc: Reviewed and amended image description. Image 1: http://echo.mpiwg-berlin.mpg.de/ECHOdocuView?url=/permanent/library/QERNH1MN/pageimg&viewMode=images&mode=imagepath&pn=283&ww=0.0926&wh=0.3884&wx=0.8441&wy=0.5255 Image 2: 110. Discourse II of ye force of pipes of a conduit and [[?]] of ye thickness wch they ought to have according to their matter and ye height of ye reservatory. When ye reservatorys are very heigh or there is made a conduit of water from very heigh place, ye pipes of ye conduit are often in danger to be broken principaqlly if ye conduit is made thr? deep valleys; and thes is very tormenting if after we have been at great cost some