CLASS II. SALINE MINERALS. FOSSIL SALTS. The. saline substances included under this Class, ard those only which are found in a natural state: tiie nu merous artificial salts described in some systems of mine ralogy, are consequently excluded. The greater number °f these natural salts appear to have been formed by the agency of air and water, and are therefore more properly atmospherical than terrestrial products. Natural Rock- salt is perhaps the only exception, it being found in the interior of the earth. I'he characters by which the substunces of this class are distinguished from those of the other classes, are prin cipally their taste, and easy solubility. -I'hey may be conveniently arranged in the following order: Order I. Earthy Salts.—Genera, Alumina, Magnesia. II. Alkaline Salts.—Genera, Soda, Potash, Am monia. TII. Metallic Salts.—Genera, Iron, Copper, Zinc, Cobalt. ORDER