"A chimpanzee is not a man."

Joe blurted out, "How much did this chimp stand, Sur­geon?"

"Three and a quarter gravities for twenty-seven days."

"He did? What shape was he in when the test ended?"

"He wasn't," the doctor grunted.

Kleuger looked at the graph, glanced at Joe, then said to the Commodore, "The boost will be at three and one-half gravities, sir."

Berrio merely said, "Very well, sir. Hurry over to sick bay. You haven't much time."

Forty-seven minutes later they were being packed into the scout torchship Salamander. She was in orbit close by; Joe, Kleuger, and their handlers came by tube linking the hub of the Station to her airlock Joe was weak and dopy from a thorough washing-out plus a dozen treatments and injections. A good thing, he thought, that light-off would be automatic.

The ship was built for high boost; controls were over the pilots' tanks, where they could be fingered without lifting a hand. The flight surgeon and an assistant fitted Kleuger into one tank while two medical technicians arranged Joe in his. One of them asked, "Underwear smooth? No wrinkles?"

"I guess."

"I'll check." He did so, then arranged fittings necessary to a man who must remain in one position for days. "The nipple left of your mouth is water; the two on your right are glucose and bouillon."

"No solids?"

The surgeon turned in the air and answered, "You don't need any, you won't want any, and you mustn't have any. And be careful in swallowing."

"I've boosted before."

"Sure, sure. But be careful."

Each tank was like an oversized bathtub filled with a liquid denser than water. The top was covered by a rubbery sheet, gasketed at the edges; during boost each man would float with the sheet conforming to his body. The Salamander being still in free orbit, everything was weightless and the sheet now served to keep the fluid from floating out. The attendants centered Appleby against the sheet and fastened him with sticky tape, then placed his own acceleration collar, tailored to him, behind his head. The surgeon came over and in­spected. "You okay?"

"Sure."

"Mind that swallowing." He added, "Okay, Captain. Per­mission to leave your ship, sir?"

"Certainly. Thank you, Surgeon."

"Good luck." He left with the technicians.

The room had no ports and needed none. The area in front of Joe's face was filled with screens, instruments, radar, and data displays; near his forehead was his eyepiece for the coelostat. A light blinked green as the passenger tube broke its anchors; Kleuger caught Joe's eye in a mirror mounted opposite them. "Report, Mister."

"Minus seven' minutes oh four. Tracking. Torch warm and idle. Green for light-off."

"Stand by while I check orientation." Kleuger's eyes dis­appeared into his coelostat eyepiece. Presently he said, "Check me, Joe."

"Aye aye, sir." Joe twisted a knob and his eyepiece swung down. He found three star images brought together perfectly in the cross hairs. "Couldn't be better, Skipper."

"Ask for clearance."

"Salamander to Control—clearance requested to Proser­pina. Automatic light-off on tape. All green."

"Control to Salamander. You are cleared. Good luck!"

"Cleared, Skipper. Minus three. Double oh!" Joe thought morosely that he should be half way to Earth now. Why the hell did the military always get stuck with these succor-&-rescue jobs?

When the counter flashed the last thirty seconds he forgot his foregone leave. The lust to travel possessed him. To go, no matter where, anywhere go! He smiled as the torch lit off.

Then weight hit him.

At three and one-half gravities he weighed six hundred and thirty pounds. It felt as if a load of sand had landed on him, squeezing his chest, making him helpless, forcing his head against his collar. He strove to relax, to let the support­ing liquid hold him together. It was all right to tighten up for a pull-out, but for a long boost one must relax. He breathed shallowly and slowly; the air was pure oxygen, little lung action was needed. But he labored just to breathe. He could feel his heart struggling to pump blood grown heavy through squeezed vessels. This is awful! he admitted. I'm not sure I can take it. He had once had four g for nine minutes but he had forgotten how bad it was.

"Joe! Joe!"

He opened his eyes and tried to shake his head. "Yes, Skipper." He looked for Kleuger in the mirror; the pilot's face was sagging and drawn, pulled into the mirthless grin of high acceleration.

"Check orientation!"

Joe let his arms float as he worked controls with leaden fingers. "Dead on, Skipper."

"Very well. Call Luna."

Earth Station was blanketed by their torch but the Moon was on their bow. Appleby called Luna tracking center and received their data on the departure plus data relayed from Earth Station. He called figures and times to Kleuger, who fed them into the computer. Joe then found that he had for­gotten, while working, his unbearable weight. It felt worse than ever. His neck ached and he suspected that there was a wrinkle under his left calf. He wiggled in the tank to smooth it, but it made it worse. "How's she look, Skipper?"

"Okay. You're relieved, Joe. I'll take first watch."

"Right, Skipper." He tried to rest—as if a man could when buried under sandbags. His bones ached and the wrinkle became a nagging nuisance. The pain in his neck got worse; apparently he had wrenched it at light-off. He turned his head, but there were just two positions—bad and worse. Closing his eyes, he attempted to sleep. Ten minutes later he was wider awake than ever, his mind on three things, the lump in his neck, the irritation under his leg, and the squeez­ing weight.

Look, bud, he told himself, this is a long boost. Take it easy, or adrenalin exhaustion will get you. As the book says, "The ideal pilot is relaxed and unworried. Sanguine in temper­ament, he never borrows trouble." Why, you chair-warming so-and-so! Were you at three and a half g's when you wrote that twaddle?

Cut it out, boy! He turned his mind to his favorite subject—girls, bless their hearts. Such self-hypnosis he had used to pass many a lonely million miles. Presently he realized wryly that his phantom harem had failed him. He could not conjure them up, so he banished them and spent his time being miserable.

He awoke in a sweat. His last dream had been a night­mare that he was headed out to Pluto at an impossibly high boost.

My God! So he was!

The pressure seemed worse. When he moved his head there was a stabbing pain down his side. He was panting and sweat was pouring off. It ran into his eyes; he tried to wipe them, found that his arm did not respond and that his finger­tips were numb. He inched his arm across his body and dabbed at his eyes; it did not help.

He stared at the elapsed time dial of the integrating ancelerograph and tried to remember when he was due on watch. It took a while to understand that six and a half hours had passed since light-off. He then realized with a jerk that it was long past time to relieve the watch. Kleuger's face in the mirror was still split in the grin of high g; his eyes were closed. "Skipper!" Joe shouted. Kleuger did not stir. Joe felt for the alarm button, thought better of it. Let the poor goop sleep!

But somebody had to feed the hogs—better get the clouds out of his brain. The accelerometer showed three and a half exactly; the torch dials were all in operating range; the radio­meter showed leakage less than ten percent of danger level.

The integrating accelerograph displayed elapsed time, velocity, and distance, in dead-reckoning for empty space. Under these windows were three more which showed the same by the precomputed tape controlling the torch; by comparing, Joe could tell how results matched predictions. The torch had been lit off for less than seven hours, speed was nearly two million miles per hour and they were over six million miles out. A third display corrected these figures for the Sun's field, but Joe ignored this; near Earth's orbit the Sun pulls only one two-thousandth of a gravity—a gnat's whisker, allowed for in precomputation. Joe merely noted that tape and D.R. agreed; he wanted an outside check.