. Stereotomy : Problems in stone cutting. In four classes. I. Plane-sided structures. II. Structures containing developable surfaces. III. Structrues containing warped surfaces. IV. Structures containing double-curved surfaces. For students of engineering and architecture . Kg. l- Fig. 2. 10. First. Fig. 1. represents the first steps in forming aplane upon a wholly unwrought block. Having two straight-edges, AB and CD, of equal width, ledges, as m n and p q, arecut on opposite edges of the stone, until the tops of thestraight-edges placed on them, as shown, are found by sight-ing, as from E, t
. Stereotomy : Problems in stone cutting. In four classes. I. Plane-sided structures. II. Structures containing developable surfaces. III. Structrues containing warped surfaces. IV. Structures containing double-curved surfaces. For students of engineering and architecture . Kg. l- Fig. 2. 10. First. Fig. 1. represents the first steps in forming aplane upon a wholly unwrought block. Having two straight-edges, AB and CD, of equal width, ledges, as m n and p q, arecut on opposite edges of the stone, until the tops of thestraight-edges placed on them, as shown, are found by sight-ing, as from E, to be in the same plane. The portion of rough stone between m n and p q is then cutaway until found, by frequent test with the straight-edge, ap-plied transversely, as at FG, to be wrought down to the planeof m n and p q. Second. Having prepared one plane surface, as shown inFig. 2, a second plane face, perpendicular to the former, maybe formed, as shown, by cutting two or more channels in anydirection on the required face, until one arm, BC, of a squarewill fit any of them, while the other arm, AB, coincides with STONE-CUTTING. 5 the given face, and in a direction perpendicular to the commonedge of the two surfaces. The intermediate rough stone is thencut down to th
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