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Updated: June 18, 2025
They are very soft and perishable, and consequently are very rarely found among the ruins of ancient Rome. The Oriental alabasters, on the other hand, which are distinguished from the European by their superior hardness and durability, are in reality not sulphates, but carbonates of lime. Their hardness is quite equal to that of the best statuary marbles.
These sulphates appear to be formed, in part, at least, by bacterial agency. This gas, which is of common occurrence in the atmosphere, is oxidized by bacterial growth into sulphuric acid, and this is the basis of part of the soil sulphates. The deposition of iron phosphates and iron silicates is probably also in a measure aided by bacterial action.
Man, who represents the highest point of intelligence, and who offers us the only organism by which we arrive at a power that is semi-creative namely, THOUGHT is, among all zoological creations, the one in which combustion is found in its most intense degree; whose powerful effects may in fact be seen to some extent in the phosphates, sulphates, and carbonates which a man's body reveals to our analysis.
Innumerable springs issue out of this green, sloping meadow among the mountains, some of them icy cold, but over twenty of them hot, and seasoned with a great many disagreeable sulphates, carbonates, and oxides, and varying in temperature from ninety-five to one hundred and twenty-three degrees Fahrenheit.
The weight of silica is 0.6460 gram. This is fused with 4 grams of sodium carbonate. How many grams of the carbonate actually combined with the silica in fusion, and what was the loss in weight due to carbon dioxide during the fusion? !Answers!: 1.135 grams; 0.4715 gram. A mixture of barium oxide and calcium oxide weighing 2.2120 grams is transformed into mixed sulphates, weighing 5.023 grams.
Soluble sulphates which form harmless sulpho-carbolates in the blood should be administered at once. An ounce of Epsom salts or of Glauber's salts dissolved in a pint of water will answer the purpose admirably. After this an emetic of sulphate of zinc may be given. White of egg and water or olive-oil may prove useful. Warmth should be applied to the body. Fatal Dose.
On a future occasion I hope to supplement this paper with the analysis of the double sulphates used, and an account of the behavior of electrolytically prepared crucibles and dishes as compared with those now in the market. Chem. News. At a recent meeting of the engineering section of the Bristol Naturalists' Society a paper on "Chilled Iron" was read by Mr. Morgans, of which we give an abstract.
If salivation occurs, the drinking of hot water and the taking of hot baths should be insisted upon, and half-dram doses of the alkaline sulphates prescribed. Methods of Administering Mercury. By the Mouth. This was for long the most popular method in this country, the preparation usually employed being grey powder, in pills or tablets, each of which contains one grain of the powder.
Filter to remove insoluble sulphates, silica and any silver that may have been precipitated as silver chloride, and receive the filtrate in a small beaker, washing the precipitate and filter paper with warm water until the filtrate and washings amount to 75 cc. Wash the cover glass and sides of the beaker.
As the hardness resulting from the carbonates of lime and magnesia is thus removable by boiling the water, it is designated temporary hardness, while the hardening effect which is due chiefly to the sulphates of lime and magnesia, and cannot be got rid of by boiling, is termed permanent hardness. The total hardness of water is therefore commonly made up of temporary and permanent hardness.
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