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heterogeneous in composition.
Drawing: cross-section of a corbelled stone arch divided vertically into three zones; labels: C; B; A; section transverse.
A - blocks " tout venant " not prepared. B - visible face dressed bedding surfaces probabl. prepared. (possibility of reuse C - very flat stones, harder limestone naturally eroded certainly do not come from quarries.
the specific use of these 3 different materials adapted to their position reveals a design that may be little careful, but very thought out and statically very subtly elaborated.
level A - vertical facing composed like a wall of rubble, great thickness resting on the rock receiving the static thrust. niveau B - amorce d'e appareil pendentif, materiau prepared to reduce the gap between walls level C - small thickness (less weight) large dimensions to cover economically and rapidly the void (moment of risk in the construction of vaults or arches)
65 figures hard to readstruck struck outadded written in above” jug ditto, and what it repeatsword reading not certain