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The method is to pump the liquid from the tanks in which it is stored and to allow it to flow back by way of the vanning apparatus, thus providing not only for catching the grains of gold by the concentrating machine, but also for the dissolving of the fine impalpable gold dust, or natural precipitate, by the action of the cyanide of potassium.
It seems that some time ago one of the helpers in the chemical department, an excitable foreigner, became dissatisfied with his wages, and after making an unsuccessful application for an increase, rushed in desperation to Edison, and said "Eef I not get more money I go to take ze cyanide potassia."
We've got a treaty with Czechoslovakia to extradite Germans accused of criminal acts but " The Gestapo chief opened the top drawer of his desk and took a small capsule from a box. "If you find yourself in an utterly hopeless situation, swallow this." He handed the pellet to the nervous young man. "Cyanide," Richter said. "Tie it up in a knot in your handkerchief.
If there is any part not sufficiently covered with copper by the cyanide solution, the sulphate will make these parts of a dark colour, which a touch of the finger will remove. When such is the case, the article must be taken out, scoured, and put again into the cyanide solution till perfectly covered. A little practice will render this very easy.
Wire from Somasco just come in and we're to let him have it as soon as we can. Oh, yes, I understand you. 'Platinum, galena, cyanide, Alton, oxide. In a vise. You've got that, Nellie? Do I know when Hallam will get it? No, I don't. Good-night."
Nothing that proved important was turned up, and even visits to near-by towns failed to show any sales of cyanide or sublimate to any one not entitled to buy them.
"Perhaps he was impertinent about it." "Possibly. The point is that the prospective purchase was cyanide of potassium, a deadly and instantaneous poison." "Are you sure?" asked the girl, in a low voice. "I've just come from the store. How long have you been here at your uncle's?" "A week."
Then wash the bottle thoroughly and dry it, finally polishing the inside with a piece of soft cloth or tissue paper. Place one ounce of cyanide of potassium into the bottle and pour in enough dry sawdust to cover the lumps of poison.
For the German nursing sisters who worked with me told of the flight to this town of outlying families, and how the women were all supplied with tablets of prussic acid to swallow, if the dreadful end approached. For death from the swift cyanide would be gentler far than at the hands of a savage native.
It is troubled with base metals to such a degree that twenty years ago it would have been only about half as valuable as it is now; for at that time there was no paying way of getting anything out of such rock but the coarser-grained "free" gold; but the new cyanide process has changed all that, and the gold fields of the world now deliver up fifty million dollars' worth of gold per year which would have gone into the tailing-pile under the former conditions.
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