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Updated: June 14, 2025
In the first three the platinum remained intact in sulphuric, nitric, and muriatic acid, but in the fourth, which contained 'aqua regia', the metal had not been able to resist the action of the acid. She melted it with the burning-glass, and said it could be melted in no other way, which proved, in her opinion, its superiority to gold.
On opening the abdomen, the viscera appeared quite healthy: the stomach was removed, and the contents were found to be more decidedly acid than usual. The acids were the muriatic and acetic: the finding of an increased quantity of these is far from being unusual. There was not a trace of arsenical, mercurial, nor any other metallic poison present.
JAPAN BLACKING. Take three ounces of ivory black, two ounces of coarse sugar, one ounce of sulphuric acid, one ounce of muriatic acid, a lemon, a table-spoonful of sweet oil, and a pint of vinegar. First mix the ivory black and sweet oil together, then the lemon and sugar, with a little vinegar to qualify the blacking; then add both the acids, and mix them all well together.
In the first three the platinum remained intact in sulphuric, nitric, and muriatic acid, but in the fourth, which contained 'aqua regia', the metal had not been able to resist the action of the acid. She melted it with the burning-glass, and said it could be melted in no other way, which proved, in her opinion, its superiority to gold.
As we advance in Chemistry, we are obliged to deal with substances which are rather injurious, if in their wrong places the acids, and heat, and combustible things we use, might do harm if carelessly employed. If you want to make hydrogen, you can make it easily from bits of zinc, and sulphuric or muriatic acid. Here is what in former times was called the "philosopher's candle."
This is another trouble with which the mule is afflicted. Cut away the parts of the frog that seem to be destroyed, clean the parts well with castile-soap, and apply muriatic acid. If you have not this at hand, a little tar mixed with salt, and placed on oakum or tow, and applied, will do nearly as well.
At the end of a week the miners began to raise some very likely-looking stone! and Grainger, finding some jars of muriatic acid among the stores belonging to the battery, made some further tests of the tailings with results which gave him the greatest satisfaction.
Thus muriatic acid is added for its chlorine, which can generally be detected by the impression produced, being of a light, soft, mellow tone, and in most cases presenting a brilliant black to that colored drapery.
"Ay! this stains the stone yellow." "A soft metal. Here in this little phial is muriatic acid. Pour a drop on my nugget. The metal defies it. Now pour on your pyrites. See how it smokes and perishes. It cannot resist the acid. There are many other tests, but little needed. No metal, no earthly substance, resembles gold in the least." "Not to a Jew's eye," whispered Robinson.
The water of the acid is decomposed, and its hydrogen combines with the chloride of the salt to form muriatic acid, and this unites with the sulphuric acid to form sulphate of soda; 60 parts of common salt and 49 parts of concentrated sulphuric acid, afford, by this mutual action, 37 parts of muriatic acid and 72 parts of sulphate of soda.
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