Mark V Shuttering.

Showing screw-up securing tackle of exterior corner-piece and its rounded interior. Also screw-cramp at interior angle of shuttering.

Scientific research could doubtless, if it would, do much towards perfecting Pisé-building.

We know very little about the behaviour of different earths under compression, or of their several reactions to chemical treatment. Meanwhile, a few trifling mechanical modifications are all that distinguish our modern plant from that devised by the ancients. That said, a short description of the “Mark V” model may be of some interest, pending the future developments that may now be hoped for.

Mark V Shuttering.

Shuttering about to be removed from a first section of Pisé walling. Top cross-braces have been thrown back and clamps to legs released. It is now only necessary to detach the stays and lift away the shutters. Where, as here, there is no masonry plinth, the bearing-pins are only required for the succeeding courses of Pisé, and need not be inserted for the first.