. Essentials of medical and clinical chemistry. With laboratory exercises . some crystals of potassium chlorate into a con-ical glass of water; add several bits of phosphorus; then by means of a pipetteintroduce sulphuric acid at the bottom of the glass. The phosphorus takesfire and burns at the expense of the oxygen of the potassium chlorate. 55 Mix on a sheet of paper 2 grams of powdered potassium chlorate and .5gram of some combustible powder, as sulphur, antimony sulphide, oj it up in the paper, place upon an anvil, and strike with ahammer. Itexplodes violently. PART I. INORGAN
. Essentials of medical and clinical chemistry. With laboratory exercises . some crystals of potassium chlorate into a con-ical glass of water; add several bits of phosphorus; then by means of a pipetteintroduce sulphuric acid at the bottom of the glass. The phosphorus takesfire and burns at the expense of the oxygen of the potassium chlorate. 55 Mix on a sheet of paper 2 grams of powdered potassium chlorate and .5gram of some combustible powder, as sulphur, antimony sulphide, oj it up in the paper, place upon an anvil, and strike with ahammer. Itexplodes violently. PART I. INORGANIC CHEMISTRY. 45 SULPHUR occurs free, especially in the neighborhood of vol-canoes ; occurs combined as sulphides and sulphates in manyvaluable ores, and in small quantity in the animal and vegetablekingdoms. Preparation,—The native sulphur, freed from stones, is refinedby distillation, as shown in Fig. 18. The crude sulphur is meltedin the tank by the hot draft from the fire below, and then runsdown through a pipe into the retort, where it is vaporized. This Fig. vapor, entering a large brick chamber, is condensed into fine,feathery crystals, called flowers of sulphur or sublimed the chamber be hot, it condenses into a liquid, which is drawnoff and moulded into rolls, called roll brimstone. Sublimed sul-phur is apt to contain more or less acid, and is washed (sulphurlotum). Boiled with lime and precipitated with HC1, it formssulphur precipitatum, U. S. P. This mixed with water is milk ofsulphur (lac sulphuris, U. S. P.). 46 ESSENTIALS OF CHEMISTRY. Physical Properties, A brittle yellow solid ; insoluble in water,hence tasteless; almost insoluble in alcohol, but very soluble inbenzine, chloroform and carbon disulphide. It occurs in fourallotropic Chemical Properties.—Inflammable, hence called brimstone(burn-stone). Combines with metals,57 forming Sul-phur forms compounds remarkably analogous to those of oxygen, . £••• —
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