Mission of Gravity

One factor alone limited Mesklin’s storms to the point where sea travel was possible: methane vapor is far denser than hydrogen. On Earth, water vapor is lighter than air, and contributes enormously to the development of a hurricane once it starts; on Mesklin, the methane picked up from the ocean by such a storm tends, in a relatively short time, to put a stop to the rising currents which are responsible for its origin. Also the heat it gives up in condensing to form the storm clouds is only about a quarter as great as would be given by a comparable amount of water — and that heat is the fuel for a hurricane, once the sun has given the initial push.

In spite of all this, a Mesklinite hurricane is no joke. Barle

The storm cell at sea level was probably three miles or so in diameter; it was traveling at about sixty or seventy miles per hour. The ending of the wind was only temporary; it meant that the center of the cyclone had reached the valley. This was also the low-pressure zone; and as it reached the sea at the mouth of the fiord, the flood came. It rose, gathering speed as it came, and spurted into the valley like the stream from a hose. Around the walls it swirled, picking up the Bree on the first circle; higher and higher, as the ship sought the center of the whirlpool — fifteen, then twenty, then twenty-five feet before the wind struck again.

Tough as the wood of the masts was, they had snapped long since. Two crewmen had vanished, their lashing perhaps a little too hastily completed. The new wind seized the ship, bare of masts as she was, and flung her toward the side of the whirlpool; like a chip, both for helplessness and magnitude, she shot along the stream of liquid now pouring up the little river toward the island’s interior. Still the wind urged her, now toward the side of the stream; and as the pressure rose once more, the flood receded as rapidly as it had risen — no, not quite; the portion now floating the Bree had nowhere to go except back out through the little river-course, and that took time. Had daylight lasted, Barle

The sea was completely out of sight beyond the hills; the limp form of a twenty-foot-long sea monster stranded on the other side of the brook gave a graphic picture of the helplessness of the Gravity Expedition.

XII: WIND RIDERS

Much of what had happened had been seen from Toorey; the radio sets, like most of the less prominent articles about the Bree’s deck, had remained lashed in position. Not much had been distinguishable, of course, while the vessel had been whirling in the brief maelstrom; but her present situation was painfully clear. None of the people in the screen room could find anything helpful to say.

The Mesldinites could say little, either. They were used to ships on dry land, since that happened fairly often during late summer and fall as the seas receded in their own latitudes; but they were not accustomed to have it happen so suddenly, and to have so much high ground between them and the ocean. Barle

They still had plenty of food, though that in the canoe had vanished. Dondragmer took occasion to point out the superiority of rafts, neglecing to mention that the supplies in the canoe had been tied down carelessly or not at all owing to a misplaced confidence in the high sides of the boat. The little vessel itself was still at the end of its towline, and still undamaged. The wood of which it had been made shared the springiness of the low-growing plants of the higher latitudes. The Bree herself, constructed of similar materials though in much less yielding form, was also intact, though the story might have been different had there been many rocks in the wall of the round valley. She was and had remained right side up, owing to her construction — Barle

„The surest way would be to take her apart, as we did before, and carry her over the hills. They’re not very steep, and there still isn’t enough weight to matter.” Barle

„You’re probably right,? Captain; but wouldn’t it save time to separate the rafts only lengthwise, so that we have rows the full length of the ship? We could carry or drag those over to the stream, and surely they’d float before we went down very far.” Hars, now his former self after his encounter with the rock, made this suggestion.

„That sounds promising. Hars, why don’t you find out just how far down that would be? The rest can start unlashing as Hars suggested, and unloading where we have to. Some of the cargo will be in the way of the lashings, I’m afraid.”

„I wonder if the weather is still too bad for those flying machines?” Dondragmer asked, of no one in particular. Barle

„The clouds are still low and the wind high,” he said. „If the Flyers are right — and they ought to know, I should think — the weather is still too bad. However, it won’t hurt to look up occasionally. I rather hope we see one again.”

„One I wouldn’t much mind myself,” replied the mate dryly. „I suppose you want a glider to add to the canoe. I’ll tell you right now that I might, in extremity, get into the canoe, but the day I climb onto one of those flying machines will be a calm winter morning with both suns in the sky.” Barle

The Flyers reported clearing weather, and the clouds obediently thi