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The Lamarre compositions are all formed of a combustible substance, such as boiled oil, of a substance that burns, such as chlorate of potash, and of various coloring salts. The white composition used for charging fire balls and 1½ inch flambeaux is formed of 500 parts of powdered chlorate of potash, 1,500 of nitrate of baryta, 120 of light wood charcoal, and 250 of boiled oil.
Just inside I came upon fifteen English people of the dressed class, except two, who were evidently bricklayers: six ladies, and nine men: and at the further end, two more, men, who had their throats cut; along one wall, from end to end were provisions; and I saw a chest full of mixed potassic chlorate and black oxide of manganese, with an apparatus for heating it, and producing oxygen a foolish thing, for additional oxygen could not alter the quantity of breathed carbonic anhydride, which is a direct narcotic poison.
It was air tight, warmed and illuminated with coal gas, and the oxygen for breathing was got from chlorate of potash, while the carbonic acid produced by the lungs and gas-burners was absorbed with caustic potash to keep the air pure. This bullet-car was fired from a colossal cast-iron gun founded in the sand.
The former is a salt which appears under the form of white crystals; when raised to a temperature of 400 degrees it is transformed into chlorure of potassium, and the oxygen which it contains is entirely liberated. Now twenty-eight pounds of chlorate of potassium produces seven pounds of oxygen, or 2,400 litres the quantity necessary for the travelers during twenty-four hours.
The high temperature changing the chlorate into a chloride, the oxygen was disengaged gradually but abundantly, every eighteen pounds of chlorate of potash, furnishing the seven pounds of oxygen necessary for the daily consumption of the inmates of the Projectile.
Take of Powdered Alum, one drachm, Simple Syrup one ounce, Water, seven ounces To make a Gargle The best medicine for the first few days of the attack, is the following mixture Take of Chlorate of Potash two drachms, Boiling Water seven ounces Syrup of Red Poppy one ounce To Make a mixture. A table spoonful to be taken every four hours.
It is, however, always wise to call in medical advice in order to settle this important question, and the more so, since there is one remedy, the chlorate of potass, which, in appropriate doses, acts upon the condition almost as a charm.
There was gunpowder of all varieties, antimony, blasting-powder, mercury cyanide, chloral hydrate, chlorate of potash, samples of various kinds of shot, some of the outlawed soft-nosed dumdum bullets, cartridges, shells, pieces of metal purposely left with jagged edges, platinum, aluminum, iron, steel a conglomerate mass of stuff that would have gladdened an anarchist.
So it was now urgent to renew the air in our prison, and no doubt the air in this whole underwater boat as well. Here a question popped into my head. How did the commander of this aquatic residence go about it? Did he obtain air using chemical methods, releasing the oxygen contained in potassium chlorate by heating it, meanwhile absorbing the carbon dioxide with potassium hydroxide?
Over fifty years ago, in a memoir on "Placental Phthisis," Sir James Y. Simpson advanced a new idea in the recommendation of potassium chlorate during the latter stages of pregnancy. The efficacy of this suggestion is known, and whether, as Simpson said, it acts by supplying extra oxygen to the blood, or whether the salt itself is conveyed to the fetus, has never been definitely settled.
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