The two ninety-degree bends he had to make were not entirely a matter of strength. The metal was of semicircular cross section, about a quarter of an inch in radius — Benj thought of it as heavy wire, while to the Mesklinites it was bar stock. The alloy was reasonably tough even at a hundred and seventy degrees Kelvin, so there was no risk of breaking; and Mesklinite strength was certainly equal to the task. What the two scientists lacked, which made the bending an operation instead of an incident, was traction.

The ice under them was fairly pure water with a modest percentage of ammonia, not so far either below its melting point or from the ideal ice crystal structure to have lost its slipperiness. The small area of the Mesklinite extremities caused them to dig in in normal walking, and this, combined with their low structure and multiplicity of legs, prevented slipping in ordinary walking around the frozen — in Kwembly. Now, however, Borndender and his assistant were trying to apply a strong side — wise force, and their twenty pounds of weight simply did not give enough dig for their claws. The metal refused to bend, and the long bodies lashed about on the ice with Newton’s Third Law in complete control of the situation. The sigh was enough to make Benj chuckle in spite of his worry, a reaction which was shard my Seumas McDevitt, who had just come down from the weather lab.

Borndender finally solved his engineering problem by going back into the Kwembly and bring out drilling equipment. With this he sank half a dozen foot-deep holes in the ice, and by standing lengthwise of drill-tower support rod in these he was able to provide anchorage for the Mesklinite muscles. The metal was finally changed from hairpin to caliper shape.

Fitting the ends into the appropriate holes was comparatively easy after the filing was finished. It involved a modest lifting job to get the wire up to the two-inch height of the socket holes, but this gave no problem either for strength or traction and was done in half a minute. With some hesitation, visible even to the human watchers, Borndender approached the controls of the power unit. The watchers were at least as tense; Dondragmer was not entirely sure that the operation was safe for his shi[, having only the words of the human beings about this particular situation, and Benj and McDevitt had doubts about the efficacy of the jury-rigged heater.

The last were speedily settled. The safety devices built into the unit acted properly as far as the machine’s own protection was concerned; they were not, however, capable of analyzing the exterior load in detail. They permitted the unit to deliver a current — not a voltage — up to a limit determined by the manual control setting. Borndender had, of course, set this at the lowest available value. The resistor lasted for several seconds, and might have held up indefinitely if the ends had not been off the ice.

For most of the length of the loop, all went well. A cl0ud of microscopic ice crystals began to rise the moment the power came on, as water boiled away from around the wire and froze again in the dense frigid air. It hid the sight of the wire singing into the surface ice, but no one doubted that this was happening.

The last foot or so at each end of the loop, however, was not protected by the high specific and latent heats of water. Those inches of metal showed no sign of the load they were carrying for perhaps three seconds; then they began to glow. The resistance of the wire naturally increased with its temperature, and in the effort to maintain constant current the power box applied more voltage. The additional heat developed was concentrated almost entirely in the already overheated sections. For a long moment a red, and then a white, glow illuminated the rising cloud, causing Dondragmer to retreat involuntarily to the other end of the bridge while Borndender and his companion flattened themselves against the ice.

The human watches cried out — Benj wordlessly, McDevitt protestingly, “It can’t blow!” their reactions were, of course, far too late to be meaningful. By the time the picture reached the station, one end of the wire loop had melted through had the unit had shut down automatically. Borndender, rather surprised to find himself alive, supplemented the automatic control with the manual one, and without taking time to report to the captain set about figuring what had happened.

This did not take him long; he was an orderly thinker, and had absorbed a great deal more alien than had the helmsmen who were still hoping for a rescue a few yards away. He understood the theory and construction of the power units about as a good high school student understands the theory and construction of a television set — that is, he could not have built one himself, but could make a reasonable deduction about the cause of a gross malfunction. He was more of a chemist than a physicist, as far as specific training went.

While the human beings watched in surprise, and Dondragmer in some uneasiness, the two scientist repeated the bending operation until what was left of the resistor was once again usable. With the drilling equipment they made a pit large enough to hold the power box at one end of the deep groove boiled in the ice by the first few seconds of power. They set the box in the hole, connected the ends once more, and covered everything with chips of ice removed in the digging, leaving only the controls exposed. Then Borndender switched on the power again, this time retreating much more hastily than before.

The white cloud reappeared at once, but this time grew and spread. It enveloped the near side of the Kwembly, including the bridge, blocking the view for Dondragmer and the communicator lens. Illuminated by the outside flood lamps, it caught the attention of the crew, now nearing the edge of the valley, and of Stakendee and his men miles to the west. This time the entire length of the wire was submerged in melted ice, which bubbled away from around it as hot vapor, condensed to a liquid a fraction of a millimeter away, evaporated again much less violently from the surface of the widening pool, and again condensed, this time to ice, in the air above. The streaming pool, some three quarters of the Kwembly’s length and originally some sex feet in width, began to sink below the surrounding ice as its contents were borne away as ice dust by the gentle wind fast than they were replenished by melting.

One side of it reach the cruiser, and Dondragmer, catching a glimpse of it through a momentary break in the swirling fog suddenly had a frightening thought. He donned his airsuit hurriedly and rushed to the inner door of the main lock. Here he hesitated; with the suit’s protection he could not tell by feel wheter the ship was heating dangerously, and there were not internal thermometers except in the lab. For a moment he thought of getting one; then he decided that the time needed might be risk, and opened the up safety valves in the outer lock, which were handled by pull cords from inside reaching down through the liquid trap. He did not know wheter the heat from outside would last long enough to boil ammonia in the lock itself — the Kwembly’s hull was well insulated, and leakage would be slow — but he had no desire to have boiling ammonia confined aboard his command. It was actually an example of a little knowledge causing superfluous worry; the temperature needed to bring ammonia vapor pressure anywhere near the current ambient value would have made an explosion the least of any Mesklinite’s concerns. However, no real harm was by opening the valves, and the captain felt better as a result of the action. He returned hastily to the bridge to see what was going on.

A gentle breeze from the west was providing occasional glimpses by sweeping the ice fog aside, and he could see that the level of the molten pool was lower. Its area had increased greatly, but as the minutes passed he decided that some sort of limit had been reached in that respect. His two men were visible at times, crawling here and there trying to find a good viewpoint. They finally settled down almost under the bridge, with breeze behind them.