Perrot, Georges, 1832-1914, Chipiez, Charles, 1835-1901, Armstrong, Walter, Sir, 1850-1918 · London, Chapman and Hall, Limited; New York, A. C. Armstrong and Son · leaf 182
the tubes which they encase they form a series of shafts, likechimneys, measuring about four feet square. Every precautionwas taken to carry off the water left by the storms. They werenot contented with the small opening at the head of each tube.The whole of its dome-shaped top was pierced with… … Fig. 49.—Uppei part of the ch-ninage arrangements of a mound. of the ground, whence, no doubt, it would be carried off to thestreams in conduits now hidden by the mass of ddbris round thefoot of every mound. That these arrangements were well adapted to their purposehas been proved by the result.…
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![An illustration from M. Vitrvvii viri svae professionis pertissimi De architectvra libri decem, ad Avgvstum Cæsarem accuratiss. conscripsit & nvnc primvm in Germania qva potuit diligentia excusi, atq[ue] hinc inde schematibus non iniucundis exornati (1543)](https://img.insideoutlibrary.com/img/200/ia-mvitrvviivirisva00vitr-104-28.webp)
