Page:Popular Science Monthly Volume 21.djvu/366

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354
THE POPULAR SCIENCE MONTHLY.

shallow, containing a plastic soda-mud in the form of chloride and carbonate, deriving its carbonic acid from one source and its chlorine from another during its deposition, or, subsequently, fissures were opened

PSM V21 D366 Crystal of native borax from borax lake.jpg
Crystal of Native Borax from Borax Lake, Natural Size.

in the subjacent strata, allowing the escape of a limited amount of jets of boracid acid from beneath in vapor, we should have all the conditions required to account for the formation of the borax in the midst of the two more loosely combined salts.