As I alighted on the pavement at my destination, two youths emerged from the door of the establishment carrying an iron cylinder
, which, with some trouble, they hoisted into a waiting motor-car.
He fancied even then that the cooling of the body might account for this, but what disturbed that idea was the fact that the ash was falling only from the end of the cylinder.
And then he perceived that, very slowly, the circular top of the cylinder was rotating on its body.
The thought of the confined creature was so dreadful to him that he forgot the heat and went forward to the cylinder to help turn.
The two men hurried back at once to the common, and found the cylinder still lying in the same position.
The spherical cap of the small cone is of platinum, so as not to melt by the action of the cylinder and blow-pipe, for the latter are placed upon the bottom of the iron tank in the midst of the helicoidal spiral, and the extremity of their flame will slightly touch the cap in question.
The cylinder once lighted, the hydrogen in the spiral and in the concave cone becomes heated, and rapidly ascends through the pipe that leads to the upper part of the balloon.
In order, then, to effect an ascent, I give the gas a temperature superior to the temperature of the surrounding air by means of my cylinder.
Why, David within this iron cylinder
we have demonstrated possibilities that science has scarce dreamed.
Upon the last sheet was a roughly drawn map with numerous reference points marked upon it, all unintelligible to Tarzan, who, after a brief examination of the papers, returned them to their metal case, replaced the top and was about to toss the little cylinder
to the ground beside the mute remains of its former possessor when some whim of curiosity unsatisfied prompted him to slip it into the quiver with his arrows, though as he did so it was with the grim thought that possibly centuries hence it might again come to the sight of man beside his own bleached bones.
The oval is almost one inch long, and tapers like a needle, the cylinder
swells at the sides, and the points are ready to open.
His object now was to raise within the center of the well, and with a coincident axis, a cylinder
900 feet high, and nine feet in diameter, which should exactly fill up the space reserved for the bore of the Columbiad.