Ruskin, John, 1819-1900 · Boston : Estes and Lauriat Publishers · leaf 162
itspressure. § II. It is e\ddent that ifwe are to place a contin-uous roof above the Hneof arches, we must fill upthe intervals betweenthem on the tops of thecolumns. We have at pres-ent nothing granted usbut the bare masonry, as here at a, Fig. XXXV., and wemust fill up the intervals between the… … FiG. xsxv. 150 THE STONES OF VENICE. esque. But if we findtoo much stress is thuslaid on the arches, wemay introduce smallsecond shafts on the topof the great shaft, a, Fig.XXXVI., which may as-sist in carrying the roof,conveying great part ofits weight at once to theheads of the main shafts,and…
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