This is how the Germans generate electricity for wireless in the trenches
A soldier sitting on a stationary bicycle. The wheels of the bicycle have been removed and it has been adapted to sit on a free-standing frame.
According to the original caption, this contraption has been developed to generate electricity. The equipment necessary to convert the pedal power into electrical power is fitted to the rear of the bicycle. This young soldier is providing a demonstration. He is in full uniform and is wearing a steel helmet, and a bag round his neck.
Due to appalling conditions in the trenches, and the frequent absence of proper equipment, soldiers became incredibly resourceful in discovering ways of overcoming particular problems. The contraption shown here is an excellent example of the lengths that some men went to.
[Original reads: ‘OFFICIAL PHOTOGRAPH TAKEN ON THE BRITISH WESTERN FRONT IN FRANCE. How the Germans generate electricity for wireless in the trenches.’]