Chalk walls, [18]

Cheap materials, the search for, [13]

Pisé de craie, [16], [17], [107]

Pisé, experiments with, [15]

in moulds, [19], [20]

in South Africa, [22], [23]

Pliny on Pisé de terre, [25]

Rammed chalk, [16], [17], [107]

[General Survey:]

Building materials, shortage of, [26]