That process of nature by which the particles of bodies are arranged systematically in passing from a liquid to a solid state. The phenomena of crystallization have much engaged the attention of modern chemists, with a view to determine exactly the different figures assumed by salts in crystallizing; but it does not yet appear that any certain rule can be laid down in these cases, as these figures may be varied by the slightest circumstances, so that the same salt frequently assumes various figures, and very different substances sometimes present themselves under absolutely the same form. The most diligent observer of the phenomena of crystallization, and who has been most successful in deducing a plausible theory from these observations, is M. Hauy; to whose work, on the Theory and Structure of Crystals, we would refer the reader who is desirous of obtaining the best information on the subject.