Paris has been greatly interested in a balloon ascent. M.
Nader thinks he has discovered a plan for an ceromotive, and in order to raise the funds for his experiment he intends to give two ascents in a giant balloon. The first came off on Sunday, and was intended to last some days; but the valve would not work, and it was necessary to descend in about four hours. The Princesse de la Tour d'Auvergue was among the fifteen who ascended, and it is recorded that, the assistant being a little slow in flinging out ballast, the company exclaimed, "Let us rise, let us rise; we want to go as high as Jacob's ladder !"--a curi- ously French remark. M. Nadar's idea for his wromotive is to make it " heavier than the air," and worked by a screw, a description which has not the advantage of intelligibility.