Specus

Definition and stakes

Portrait of John Henry Parker John Henry Parker,  The archæology of Rome, Part VIII (1876)

“ At about every half-mile the specus forms an angle to break the force of the water, and at such points there is usually a reservoir also. Advantage was taken of these angles for the later aqueducts to be carried over the older ones, as at the Torre Fiscale and the Porta Maggiore. These precautions, combined with the system of Piscinæ, rendered the water constantly fresh, pure, and wholesome.
From some considerable remains of the Piscinæ, the system can be clearly made out. The building consisted of four chambers, two beneath and two above.
”
Source: Gutenberg

Portrait of John Henry Parker John Henry Parker,  The archæology of Rome, Part VIII (1876)

“ The part near the reservoir is destroyed, as is the opposite end near that place, but great part of the arcade in the intervening portion remains nearly perfect, and is one of the finest arcades of the aqueducts, extending for miles across the country between the Via Gabina and the Via Labicana. In some places it is double, one arcade over another, to cross a low valley or a stream. At about a quarter of a mile from the source, the specus is open in two places, so that a man can walk along it, being nearly six feet high and three wide. ”
Source: Gutenberg

Portrait of Herbert Spencer Herbert Spencer,  The Principles of Biology — Chapter II.10a (1898)

“ Additional traits distinguish the units of each Mammalian order; and, again, those of every genus included in it; while others severally characterize the units of each species. Similarly with the varieties in each species, and the stirps in each variety. Now the ability of any component unit to carry within itself the traits of the sub-kingdom, class, order, genus, species, variety, and at the same time to bear the traits of immediate ancestors, can exist only in a something having multitudinous proximate elements arranged in innumerable ways. ”
Source: Wikisource

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