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Note 170 jpg

Summary: as Hh1g2G gives that of the intrados The figure hhlg1g reversed as in the projection with its point h in contact with the horizontal line hh forms the first plane of development Fig 120 Draw a line through h on plan parallel to h1g1 and with this as base line lay off distances on the horizontal hh equal to the distance of the points of the voussoir from the

Image Dimensions: 500 x 772