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Updated: May 31, 2025
He breathed a sigh of relief when it was in place. He'd arranged for it to break a frozen-brittle switch as it descended. When it came off, the switch would light the lamp with its bare filament. There was powdered magnesium in contact with it and liquid oxygen all about. He went out of the shack by the air lock. On the way, thinking about Sattell, he suddenly recovered a completely new memory.
As he approached the strong box, the master criminal took two vials from his pockets. Removing a bust of Shakespeare that stood on the safe, he poured the contents of the vials in two mixed masses of powder forming a heap on the safe, into which he inserted two magnesium wires.
"Professor," said Captain Nemo, "my electricity is not everybody's. You know what sea-water is composed of. In a thousand grammes are found 96 1/2 per cent. of water, and about 2 2/3 per cent. of chloride of sodium; then, in a smaller quantity, chlorides of magnesium and of potassium, bromide of magnesium, sulphate of magnesia, sulphate and carbonate of lime.
In the form of ashes, marl or chalk, lime has been used as a fertilizer for thousands of years. It serves two very important purposes: to correct the acidity of sour soils and to supply calcium and sometimes magnesium as plant food.
Where, as is sometimes the case, a strong white light is required, this may be produced by burning the end of a piece of magnesium wire in the flame of an ordinary candle. These points being disposed of, costume and make-up will be the next consideration. As to the latter, the reader will find full instructions in the chapter devoted to private theatricals.
This rude appliance was afterwards refined into the needle compass for guiding mariners on the sea, and assisting the professors of feng- shui or geomancy in their magic rites. Magnetite was also found at Heraclea in Lydia, and at Magnesium on the Meander or Magnesium at Sipylos, all in Asia Minor.
Care needs to be taken to keep the water out of the mouth, nose and eyes, as it is so salty that it is very disagreeable to these tender surfaces. Dead Sea water is two and a half pounds heavier than fresh water, and among other things, it contains nearly two pounds of chloride of magnesium, and almost a pound of chloride of sodium, or common salt, to the gallon.
Suspecting there was something wrong, he got into the shade under the hedge and crept noiselessly along, taking out of his pocket a piece of magnesium wire which he had made use of in his lecture, and a match-box. Presently he saw the figure raise itself from the ground towards a window, and immediately struck a match and ignited the wire, which he held over his head.
Oil should not be given. Sulphate and carbonate of magnesium, mucilaginous drinks. Sulphate of copper is a valuable antidote, both as an emetic and as forming an insoluble compound with phosphorus. Fatal Dose. One grain and a half. Fatal Period. Four hours; more commonly two to four days. Detection of Phosphorus in Organic Mixtures. Mitscherlich's method is the best.
"Some powdered metallic aluminum mixed with oxide of iron," whispered Constance in return. "I read of this thing in a scientific paper the other day, and I determined to get some of it. But I didn't think I'd ever really have occasion to use it." She added some powder from the other vial. "And that?" "Magnesium powder." Constance had lighted a match.
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