The engines were in a front chamber of the body. There were four of them, each no bigger than a gallon jug; but Moit assured us they were capable of developing twenty-five horse-power each, or a total of one hundred horse-power, owing to the wonderful efficiency of the compressed air. All the other machinery was similarly condensed in size and so placed that the operator could reach instantly any part of it.
The entrance was at either side or at the back, as one preferred, but the seats were arranged in a circle around the body, with the exception of the driver’s chair. So roomy was the car that from six to eight passengers could be carried with comfort, or even more in case of emergency.
All of these things were more easily understood by observation than I can hope to explain them with the pen. Perhaps I have omitted to describe them to you as clearly as I should; but I must plead in extenuation a lack of mechanical knowledge. That you will all ride in similar cars some day I have no doubt, and then you will understand all the details that I, a plain sailor, have been forced to ignore because of my ignorance of mechanics.
“But,” said Uncle Naboth, whose eyes were fairly bulging with amazement, “I don’t yet see what drives the blamed thing through water.”
Moit smiled for almost the first time since I had known him, and the smile was one of triumphant pride.
He entered the automobile, touched some buttons, and with a whirring sound a dozen little scoop-shaped flanges sprang from the rim of each wheel. There was no need for farther explanation. We could see at once that in water the four wheels now became paddle-wheels, and their rapid revolution would no doubt drive the machine at a swift pace.
The paddles were cleverly shaped, being made of the same metal employed everywhere in the construction of this astonishing invention, and they stood at just the right angle to obtain the utmost power of propulsion.
“Aluminum?” questioned Mr. Perkins, pointing to the metal.
“No, sir. This is perhaps my most wonderful discovery, and you will pardon me if I say it is a secret which I am unwilling at this time to divulge. But I may tell you that I have found an alloy that is unequalled in the known world for strength, durability and lightness. It weighs a little more than pure aluminum, but has a thousand times its tensile strength. You may test one of these blades, which seem to the eye to be quite delicate and fragile.”
Uncle Naboth leaned over and gingerly tested one of the wheel blades with his thumb and finger. Then he exerted more strength. Finally he put his heel upon it and tried to bend it with the weight of his body. It resisted all efforts with amazing success.