Translations for dome in French

Here are paragraphs from public domain books translated:

He brought out a lump of basalt of a considerable size, constructed in the middle so that a cord could be easily attached to it. This cord was the one which we had brought with us on to the plateau after we had used it for climbing the pinnacle. It was over a hundred feet long, and though it was thin it was very strong. He had prepared a sort of collar of leather with many straps depending from it. This collar was placed over the dome of the balloon, and the hanging thongs were gathered together below, so that the pressure of any weight would be diffused over a considerable surface. Then the lump of basalt was fastened to the thongs, and the rope was allowed to hang from the end of it, being passed three times round the Professor's arm.

Il alla chercher un grand bloc de basalte, approprié de façon à ce qu’on pût nouer une corde à son centre : cette corde était celle que nous avions apportée sur le plateau après l’avoir utilisée pour gravir l’aiguille ; longue de cent pieds, elle était, quoique mince, très solide. Challenger avait préparé une sorte de collier de cuir d’où pendaient un grand nombre de courroies ; il le plaça sur le dôme du ballon, réunit par-dessus les courroies, de façon à ce que tout le poids se répartît sur une grande surface, puis, ayant attaché au bout des courroies le bloc de basalte, il en laissa pendre la corde, qu’il enroula trois fois autour de son bras.

The Lost World, by Arthur Conan Doyle

Le Monde perdu, de Arthur Conan Doyle