Indian Rubber Floats

- On Saturday lest (says the rsewark Daily Adver user) we witnessed an exhiuition at Jersey City of India Rubber Floatg, invented by an ofiicer in the army. The contrivance is remarkably simple, consisting oftwo or more cylinders, made of heavy canvass, coated with "Goodyear's insoluble rubber," inflated and altached to 'uaooaoe 'g(ns and ordnance, Lor floating the same across rivers. In this experiment two small cylinders were used, and attached to a wagon weighing 1,635 Ibs ; the wagon was then filled with persons, and it floated with as much buoyancy as a life boat. If the water isshoal, the wheels support the wagon, and in deep water the fioats sustain it. Il s attached in a few momemts, and detached by removing six piecês, so that it can bc drawn across the stream with cords, and in this way an army with ihe'ir bnggage train can be passed overa stream as rapidly as over a bridge. For the Western and and Southern portions of our territory, where there are no bridges, this apparatus will be found invaluabla aside from the business of the army, and we havo no doubt will recommend itself as a most valuablc improvement.