For, if the town intended to be destroyed should have in it any tall rocks, as it generally falls out in the larger cities, a situation probably chosen at first with a view to prevent such a catastrophe; or if it abound in high spires, or pillars of stone, a sudden fall might endanger the bottom or under surface
of the island, which, although it consist, as I have said, of one entire adamant, two hundred yards thick, might happen to crack by too great a shock, or burst by approaching too near the fires from the houses below, as the backs, both of iron and stone, will often do in our chimneys.
It follows, then, that at 320 feet this pressure equals that of 10 atmospheres, of 100 atmospheres at 3,200 feet, and of 1,000 atmospheres at 32,000 feet, that is, about 6 miles; which is equivalent to saying that if you could attain this depth in the ocean, each square three-eighths of an inch of the surface
of your body would bear a pressure of 5,600 lb.
Instances of discrete quantities are number and speech; of continuous, lines, surfaces
, solids, and, besides these, time and place.
If this planet has any atmosphere at all, it is one of no great density, and its orbit being without our own, we can easily trace on its surface
the outlines of seas and continents.
At first I imagined it to be produced by a shoal of fish sporting on the surface
, but our savage friends assured us that it was caused by a shoal of 'whinhenies'(young girls), who in this manner were coming off from the shore to welcome is.
He had come to the surface
facing down the stream; in a moment the visible world seemed to wheel slowly round, himself the pivotal point, and he saw the bridge, the fort, the soldiers upon the bridge, the captain, the sergeant, the two privates, his executioners.
Somewhere beyond I knew that it rose again, but of what value was that to me, since I did not know how great the distance that it maintained a level entirely beneath the surface
of the water!
As soon as he trotted out upon the surface
of the river he found himself safe from pursuit, and Zeb was already running across the water toward Dorothy.
We may stop here, and die of asphyxiation when our atmosphere tanks are empty," replied Perry, "or we may continue on with the slight hope that we may later sufficiently deflect the prospector from the vertical to carry us along the arc of a great circle which must eventually return us to the surface
It was the peace-sign that is recognized everywhere upon the surface
On the level with the surface
of the water he saw a large opening in the dark and slimy wall.
Instead, he filled his lungs with air before the huge reptile dragged him beneath the surface
, and then, with all the might of his great muscles, fought bitterly for freedom.