. 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 . regarding them. When important lines are hidden by viewing a structure, asusual, vertically downwards from above it, its horizontal pro-jection may be inked as if the object were seen by looking at itvertically upward from below it. The greater complexity of some of the figures will make itconvenient to adopt the rule of di
. 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 . regarding them. When important lines are hidden by viewing a structure, asusual, vertically downwards from above it, its horizontal pro-jection may be inked as if the object were seen by looking at itvertically upward from below it. The greater complexity of some of the figures will make itconvenient to adopt the rule of distinguishing invisible linesof the structure from the lines of construction, by dotting theformer and marking the latter in short dashes ; a distinctionnot shown, however, on the plates of this volume. 9. In order to secure a brief, yet comprehensive exhibition ofthe elements of stone-cutting, that is, one representing everyimportant class of structures, and form of surface, they maybe classified as in the General Table, the frontispiece. CLASS I. Plane-Sided Structures. Problem I. To form plane surfaces of stone, making any given angle with each other. This fundamental problem, being of constant occurrence, ishere separately explained, in order to avoid 25
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