Excerpt from The Action, Therapeutic Value and Use of the Carlsbad Sprudel Salt (Powder Form) And Its Relation to the Carlsbad Thermal Water

I have myself repeatedly analyzed the Sprudel Salt as found in com merce, and found the quantitative deviations of the main constituents to vary at the most but 2 per cent. I found, for instance, by trituration with normal hci, the percentage of sodium bicarbonate to be per cent. To per cent.; with barium chloride the percentage of sodium sulphate per cent. To per cent; with silver nitrate the percentage of sodium chloride per cent. To per cent. I have also always found the desired result, based on analysis by weight, that all carbonates exist as acid salts in the Sprudel Salt (powder form), which goes to prove that the same has been prepared conscientiously and carefully. The natural Carlsbad Sprudel Salt (powder form) therefore contains, with the exception of the silicic acid, aluminium oxide and the carbonates of calcium, magnesium, of iron and manganese, all of the soluble constituents of the Sprudel water, in the same combinations and quantitative relation in which they exist in the Sprudel water. I will treat later on in the chapter on the relation of the Sprudel Salt (powder form) to the Sprudel water. According to its chemical composition, the Sprudel Salt (powder form) is therefore a very desirable saline medicine, and it remains incomprehensible why, in the practice of some physicians, the crystalline should still be preferred to the Sprudel Salt (powder form), so that, at present, more must still be made of the former than of the latter. Inasmuch as I had found slight variations in the chemical composition of the Sprudel Salt, variations that were unavoidable, it became a matter of importance to me to obtain a homogeneous product of identical chemical composition for my clinical experiments. To obtain such a one I applied direct to Dr. Sipocz, director of the municipal works, who, with the obliging consent of the Mayor, Herr E. Knoll, not only placed such a one at my disposal, but instituted a special quantitative analysis of the same. Ac cording to the analysis, the preparation used in my experiments was found to be of the following composition in relation to the main constituents: Sul phates, calculated as sodium sulphate, per cent. Sodium chloride, per cent. Sodium hydrocarbonate, per cent.

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