Saladin box

It consists of a large rectangular container about 50 meters in length, and a set of vertical screws attached to a crossbar.

The crossbar moves horizontally across the length of the container while the motion of the screws raises the barley from the bottom to the top.

[1] The Saladin box was invented by French engineer Charles Saladin in the late 1800s to overcome the problem where the roots of the malting barley would become entangled if not regularly turned by hand, forming large mats unusable for further processing, as encountered in the earlier system that used artificial air flow to cool the barley in deeper beds designed by Galland.

[2] Modern malting devices use a similar systems of screws as those invented by Saladin, but use ribbon screws rather than closed screws, perforated floors for aeration and cooling, and circular vessels instead of rectangular boxes[1] In Scotland there's only one distillery that still uses the Saladin box: Tamdhu.

Tamdhu was, incidentally, also one of the first Scottish distilleries to install a Saladin box.