In one litre, there was contained: Free Sulphuric Acid, a trace, but it is very perceptible at the spring. Free Carbonic-acid, 2/3 the volume of water. Bicarbonate of [Lime, Magnesia] 0.390 grammes. Bicarbonate of Soda, 0.006 grammes. Potash, salts, a trace. Sulphates (probably anhydrous) of [Soda, Lime, Magnesia] 0.043 grammes. Chloride of Sodium, 0.030. Alkaline, Iodides and Bromides, 0.008. Arseniates, a trace. Sesquioxide of Iron with Manganese, 0.002. Silica and Alumina, 0.128. Earthy Phosphates, a trace. Nitrogenized organic matters, an uncertain amount. Authority. Dr. Espanet, Journ. de la Soc. Gallicane, 2d Series, vol. 4, p. 65.