Josef Jindřich Šechtl:
Threshing grain on School farm in Tábor, before 1926
The stationary engine is
providing power for the threshing machine inside the barn.
Stationary engines like this were used to provide power for many
different tasks, such as threshing, sawing timber, cutting chaff,
driving lathes, and so on. The engine is probably an internal
combustion engine, as there is no visible steam boiler.