Signor Davelli, Jack, and I entered the car, and the Signor took a bottle of liquid out of one of the numbered boxes and poured it into one of the vessels. Then in all the vessels there seemed to be a sound like boiling, and presently the balloons became inflated and raised the car very gently and quite evenly. When we had been thus lifted to a height of about a hundred feet from the platform, he put on a dark-looking pair of gloves and laid hold of a strong thick wire, which I had not seen before, which was fastened to the bar which I had supposed to be of metal on the side further from where I sat. This wire he connected with the batteries of either end, and immediately took off the gloves. Presently the paddles began to move with a wing-like action, driving the car straight forward through the air. All this time we were still rising slowly, but when we had attained a high degree of speed Signor Davelli turned the key of a valve which communicated with both balloons and they presently collapsed, the action of the paddles being now sufficient both to sustain us and to urge us forward. The motion was easier than that of any conveyance that I had ever yet travelled in. The seat on which Signor Davelli sat was placed so that with one hand he could turn the key of the valve, and with the other grasp either of two handles, by one of which he managed the batteries, and by the other of which he changed at need the direction of the paddles. I perceived, upon looking more closely, that the key of the valve was fixed at the intersection of two tubes shaped like a T, one at right angles to the other, the horizontal tube joining the balloons and the perpendicular tube connected with the vessels from which the sound of boiling still proceeded.