Another Chappe telegraph Rijnstraat Closed letter box Refuse containers Laying an underwater telegraph cable Operating a needle telegraph Telegraph with Morse system Ticket for Topkino House on the Langebrug Cat on a bench Ticket for the Wiener Riesenrad Vierde Binnenvestgracht Ventilation Vienna public transport tickets Ticket for The Third Man in the Burg-Kino Telegraph cable in the hull of the ship Entrance to the Tevelingshof Haverstraat Vierde Binnenvestgracht Lifting a broken cable Transatlantic telegraph cable B/W cat Levendaal Old telegraph Wheatstone telegraph Ticket for the Kunsthistorisches Museum in Vienna Klimmende Leeuwsteeg Klimmende Leeuwsteeg Klimmende Leeuwsteeg Nieuwstraat Studio of Jacob van Swanenburgh Hans Christian Ørsted discovers that a compass nee… Windows William Cruickshank’s trough battery First savings account Giant trough battery in London Ticket for the Technisches Museum in Vienna Ticket for the Pathologisch-anatomische Sammlung i… Cat Cat First savings account passbook Ancient drawing probably made by cavemen Galvanic experiments on animals Experiment on a body Building project on the Botermarkt