Some suggestions regarding the formation of "enhydros" or water-stones
Mr. E . J. Dunn has given a description of the characters of those specimens which he obtained from Spring Creek, Beechworth; Victoria, and in a later paper in the same volume (page 71) Mr. George Foord more minutely described them, and also gave the results of a qualitative analysis of the liquid contained in one. He found it to be a dilute aqueous solution of chlorides and sulphates of calcium, magnesium and sodium, with a soluble form of silica. The author also sought to explain their formation on the supposition that a certain proportional mixture of colloidal and crystalline silica in solution might have a tendency on deposition to assume a definite crystalline form.