Ruskin, John, 1819-1900 · Boston : Aldine Book Publishing Co. · leaf 155
is to besolved by the arch builder is not merely to carry this weight,but to carry it with the least thickness of shell. It is easy tocarry it by continually thickening your voussoirs : if you havesix feet depth of sand or gravel to carry, and you choose toemploy granite voussoirs six feet thick,… … Plate III.—Alien Masonry. THE ARCH MASONRY. 139 thickness of voussoir which will be safe ; and to do this re-quires peculiar arrangement of the lines of the arch. Thereare many arrangements, useful all in their way, but we haveonly to do, in the best architecture, with the simplest andmost easily…
Architecture
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