Pliny on mirrors.

Pliny on mirrors (Naturalis Historia 33.45): Plurimum refert concava sint et poculi modo an parmae Threcidicae, media depressa an elata, transversa an obliqua, supina an recta, qualitate excipientis figurae torquente venientes umbras. It matters greatly whether they are concave like a cup or like the Threx’s parma shield, whether they are lowered or raised in […]

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