"You have no idea how to proceed?"
Meth Cagno smiled slightly. "I have one or two ideas. In fact, tomorrow, at noon precisely, we will test one of these ideas."
The following day, an hour before noon. Sklar Hast rowed to the isolated pad on which Meth Cagno had established his workshop. Cagno himself was hard at work on an intricate contrivance whose purpose Sklar Hast could not fathom. A rectangular frame of stalk rose ten feet in the air, supporting a six-foot hoop of woven withe in a plane parallel to the surface of the float. To the hoop was glued a rather targe sheet of pad-skin, which had been scraped, nibbed and oiled until it was almost transparent. Below Meth Cagno was arranging a box containing ashes. As Sklar Hast watched, he mixed in a quantity of water and some gum, enough to make a gray dough, which he worked with his fingers and knuckles, to leave a saucer-shaped depression.
The sun neared the zenith; Cagno signaled two of his helpers. One climbed up the staging; the other passed up buckets of water. The first poured these upon the transparent membrane, which sagged under the weight.
Sklar Hast watched silently, giving no voice to his perplexity. The membrane, now brimming, seemed to bulge perilously. Meth Cagno, satisfied with his arrangements, joined Sklar Hast. "You are puzzled by this device; nevertheless it is very simple. You own a telescope?"
"I do. An adequately good instrument, though the gum is clouded."
"The purest and most highly refined gum discolors, and even with the most careful craftsmanship, lenses formed of gum yield distorted images, of poor magnification. On the Home World, according to Brunei, lenses are formed of a material called 'glass.* "
The sun reached the zenith; Sklar Hast's attention was caught by a peculiar occurrence in the box of damp ash. A white-hot spot had appeared; the ash began to hiss and smoke.
He drew near in wonderment. "Glass would seem to be a useful material." Meth Cagno was saying. "Brunei describes it as a mixture of substances occuring in ash together with a compound called 'silica' which is found in ash but also occurs in the husks of sea-ooze: 'plankton,' so Brunei calls it.
Here I have mixed ash and sea-ooze; I have constructed a water-lens to condense sunlight, I am trying to make glass…" He peered into the box, then lifted it a trifle, bringing the image of the sun to its sharpest focus. The ash glowed red, orange, yellow; suddenly it seemed to slump.
With a rod Cagno pushed more ash into the center, until the wooden box gave off smoke, whereupon Cagno pulled it aside, and gazed anxiously at the molten matter in the center.
"Something has happened; exactly what we will determine when the stuff is cool." He turned to his bench, brought forward another box, this half-full of powdered charcoal. In a center depression rested a cake of black-brown paste.
"And what do you have there?" asked Sklar Hast, already marveling at Cagno's ingenuity.
"Dried blood. I and my men have drained ourselves pale.
Brunei reveals that blood contains iron. Now I will try to bum away the various unstable fluids and oozes, to discover what remains. I hope to find unyielding iron." Cagno thrust the box under the lens. The dried blood smoldered and smoked, then burst into a reeking flame which gave off a nauseous odor. Cagno squinted up at the sun. "The lens bums well only when the sun is overhead, so our time is necessarily limited."
"Rather than water, transparent gum might be used, which men would harden, and the sun could be followed across the sky."
"Unfortunately no gum is so clear as water," said Cagno regretfully. "Candle-plant sap is yellow. Bindlebane seep holds a blue fog."
"What if the two were mixed, so that the blue defeated the yellow? And then the two might be filtered and boiled. Or perhaps water can be coagulated with tincture of bone."
Cagno assented. "Possibly feasible, both."
They turned to watch the blood, now a glowing sponge which tumbled into cinders and then, apparently consumed, vanished upon the surface of the blazing charcoal. Cagno snatched the crucible out from under the lens. "Your blood seems not over-rich," Sklar Hast noted critically. "It might be wise to tap Barquan Blasdel and the other Intercessors; they appear a hearty lot."
Cagno clapped a cover upon the box. "We will know better when the charcoal goes black," He went to his bench, brought back another box. In powdered charcoal stood another tablet, this of black paste. "And what substance is this?" inquired Sklar Hast.
"This," said Meth Cagno, "is kragen blood, which we boiled last night. If man's blood carries iron, what will kragen blood yield? Now we discover." He thrust it under me lens. Like the human blood it began to smolder and bum, discharging a smoke even more vile than before. Gradually the tablet flaked and tumbled to the surface of the charcoal; as before Cagno removed it and covered it with a lid. Going to his first box, he prodded among the cinders with a bit of sharp bone, scooped out a congealed puddle of fused material which he laid on the bench. "Glass. Beware- It is yet hot."
Sklar Hast, using two pieces of bone, lifted the object. "So dlis is glass. Hmm. It hardly seems suitable for use as a telescope lens. But it may well prove useful otherwise. It seems dense and hard-indeed, almost metallic."
Cagno shook his head in deprecation. "I had hoped for greater transparency. There are probably numerous impurities in the ash and sea-ooze. Perhaps they can be removed by washing the ash or treating it with acid, or something of the sort."
"But to produce acid, electricity is necessary, or so you tell me."
"1 merely quote Brunei."
"And electricity is impossible?" Cagno pursed his Ups. "That we will see. I have hopes.
One might well think it impossible to generate electricity using only ash. wood, water and sea-stuff-but we shall sec.
Brunei offers a hint or two. But first, as to our iron…"
The yield was smalclass="underline" a nodule of pitted gray metal half the size of a pea. "That bit represents three flasks of blood."
Cagno remarked glumly. "If we bled every vein on the float we might win sufficient iron for a small pot."
"This is not intrinsically an unreasonable proposal," said Sklar Hast. "We can all afford a flask of blood, or two, or even more during the course of months. To think-we have produced metal entirely on our own resources!"
Cagno wryly inspected the iron nodule. "There is no problem to burning me blood under the lens. If every day ten of the folk come to be bled, eventually we will sink the pad under the accumulated weight of iron." He removed the lid from the third box. "But observe here! We have misused our curses! The kragen is by no means a creature to be despised!"
On the charcoal rested a small puddle of reddish-golden metaclass="underline" three times as large as the iron nodule. "I presume this metal to be copper, or one of its alloys." said Cagno- "Brunet describes copper as a dark red metal, very useful for the purpose of conducting electricity."
Sklar Hast lifted the copper from the coals, tossed it back and forth till it was cool. "Metal everywhere! Nicklas Rile has been hacking apart the kragen for its bones. He is discarding the internal organs, which are black as snuff-flowerPerhaps they should also be burned under the lens."
"Convey them here, I will bum them. And then, after we bum the kragen's liver, or whatever the organ, we might attempt to bum snuff-flowers as well."
The kragen's internal organs yielded further copper. The snuff-flowers produced only a powder of whitish-yellow ash which Mem Cagno conscientiously stored in a tube labeled: ash of snuff-flower.