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Updated: May 6, 2025
Q. I understand you to say you used anhydrous hydrocyanic or cyanhydric acid. A. Yes, sir. Q. Do you sufficiently understand chemistry to use these terms with accuracy? Might you not have used potassium cyanide or prussiate of potash? A. I am a tolerably good chemist, and have spoken understandingly.
If it is desired to determine the percentage of silica separately, the ignited residue should be mixed in a platinum crucible with about six times its weight of anhydrous sodium carbonate, and the procedure given on page 151 should be followed.
"SETTING" OF GYPSUM. This setting is the result of two distinct, though simultaneous, phenomena. On the one hand, portions of anhydrous calcium sulphate, when moistened with water, dissolve as they are hydrated, forming a supersaturated solution. On the other hand, this same solution deposits crystals of the hydrated sulphate, gradually augment in bulk, and unite together. H. Le Chatellier.
The removal of anhydrous sulphuric acid from the gases from roasting-furnaces has hitherto, as at the Waldmeister works, near Stolberg, been effected by means of water trickling down in a tower filled with coke, the gases entering below and moving upward.
The formula is as follows, for which the world is indebted to Canon Beechy: In 8 ounces of absolute alcohol dissolve 5 drachms of anhydrous bromide of cadmium. The solution will be milky. Let it stand at least twenty-four hours, or until perfectly clear; it will deposit a white powder. Decant carefully into an 8-ounce bottle, and add to it a drachm of strong hydrochloric acid.
So we both alleged a state of utter repletion, and did not solve the mystery of the contents of the cupboard, not too luxurious, it may be conjectured, and yet kindly offered, so that we felt there was a moist filament of the social instinct running like a nerve through that exsiccated and almost anhydrous organism. We left him with professions of esteem and respect which were real.
Coal-bearing strata are found at Bowen River, in Queensland, covering an area of 24,000 square miles, whilst important mines of Cretaceous age are worked at Ipswich, near Brisbane. In New Zealand quantities of lignite, described as a hydrous coal, are found and utilised; also an anhydrous coal which may prove to be either of Cretaceous or Jurassic age.
So we both alleged a state of utter repletion, and did not solve the mystery of the contents of the cupboard, not too luxurious, it may be conjectured, and yet kindly offered, so that we felt there was a moist filament of the social instinct running like a nerve through that exsiccated and almost anhydrous organism. We left him with professions of esteem and respect which were real.
If, on the other hand, we commence with a saturated saline solution, in general it is noticed on cooling the liquid a separation of salt ensues, which salt sinks to the bottom of the mass, and may be removed. The salt so separating may be either anhydrous or a "hydrate" of greater concentration than the mother-liquor.
The inventor has made numerous experiments with his apparatus, and thinks it permits of determining the total force developed by powder very perfectly. For obtaining anhydrous or very concentrated vinegar directly from pyrolignite of lime or other acetates by a single distillation, Mr. D. Sandmann, of Charlottenburg, employs the apparatus shown in the accompanying engraving.
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