Fk;. 150.—Method of closing a gallery by a stone portcullis; from the southern pyramid ofDashour. Drawn in perspective from the plans and elevations of Perring. result, and even supposing that they expended considerable timeand trouble in the search, they might easily have failed topenetrate into… … Fro. 151.—Portcullis closed. Another ingenious arrangement which demands our notice isthat of those discharging chambers to which we have alreadyalluded. These chambers were explored, not without trouble,Du Barry de Merval, Etudes snr TArchitecture £gyftien9ie, jip. 129, 130. The Tomb under the…
Art
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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-73-11.webp)
