United States or Vanuatu ? Vote for the TOP Country of the Week !


This is the furnace by which he fuses his forty pounds or fifty pounds of platinum at once. The metal is raised to a heat that no eye can bear. There is no light and shadow, no chiaro-oscuro there; all is the same intensity of glow. You look in, and you cannot see where the metal or the lime is; it is all as one.

In his experiments with the platinum-iridium lamps, he had been working all the time toward the proposition of high resistance and small radiating surface, until he had made a lamp having thirty feet of fine platinum wire wound upon a small bobbin of infusible material; but the desired economy, simplicity, and durability were not obtained in this manner, although at all times the burner was maintained at a critically high temperature.

Well, if anybody wondered why, when they played that tape off six months from now in Johannesburg on Terra, they could look in the cargo holds of the ship that had brought it across five hundred light-years of space. Ingots of gold and platinum and gadolinium. Furs and biochemicals and brandy. Perfumes that defied synthetic imitation; hardwoods no plastic could copy. Spices.

How could she have guessed him the same as the scintillant creature of platinum and diamonds that she had seen for a brief hour under such different circumstances at the court of her august sire? Luud saw Ghek following the strange warrior into the chamber. "Strike him down, Ghek!" commanded the king. "Strike down the stranger and your life shall be yours."

Accompanied by the mineralogist Gustave Rose, the naturalist Ehrenberg, well known for his travels in Upper Egypt and Nubia, and Baron von Helmersen, an officer of engineers, Humboldt travelled through Siberia, visited the gold and platinum mines of the Ural Mountains, and explored the Caspian steppes and the Altai chain to the frontiers of China.

Toward the end of the excavation large pieces were scarce, and it was evident that the mine was what is called a "lode." "Well, shall we go back now?" asked Tom one day, after the finish of their mining operations. The work was comparatively simple, as the platinum lumps had merely to be dug out of the sides of the cave. But the loneliness and dreariness of the place was telling on them all.

It's got gold beat now, and the available supply is very small, and it's getting more scarce. Russia has several mines, and the metal is of good quality. I've used some Russian platinum, but the kind Mr. Petrofsky gave me to-day was better than the best I ever had. If we can only find that lost mine we'll be millionaires all right."

When this is done, the electrical current discharged into the vacuum seems to flash out around the inner surfaces of the tube, in the form of light. There are brilliant coruscations from one end to the other of the tube. The tips of the platinum wire constituting the inner poles glow and seem to flame.

M. Lenoble in researches on the traction of metallic wires, and M. Chevalier in experiments on the permanent variations of the electrical resistance of wires of an alloy of platinum and silver when submitted to periodical variations of temperature, have likewise afforded verifications of the theory propounded by M. Duhem.

"This is none too safe, Dick." "No, it isn't, Mart. But we've got to see whether we can't find some copper, and I would like to get some more of this stuff, too. I don't think it's platinum, I believe that it's X." As they reached the broken projections, Margaret glanced back over her shoulder and screamed.