by penetrating into the building(ship) of 1884, the visitor is projected in the last century. He(It) discovers the world of the "machinery", witness(baton) of the know-how of the men(people), the history(story) of their labour, their roots and he(it) notices that technology can be "beautiful".
The electrical wire(main thread) of this industrial adventure is other than concern(marigold) to bring more comfort always to the population.