The Sawmill Remblinghausen in Meschede (Germany, North Rhine-Westphalia) has been using the horizontal steel-waterwheel for generating electric light since...

This is a light switch that has a sound and appearance that is very common to many Finns. It is a rotary switch that is found in many Rintamamiestalos....

The pneumatic lamp presumably was used in the Ruhr-area coal mining industry as an underground source of light in the 1940s. Today it belongs to the LWL-Industrial...