Contractions. - Kali-n., or Nitr. Nit.

Present name. - Potassic Nitrate. Kno3.

Nitre, Saltpetre, or Nitrate of Potash.

This may be obtained from the manufacturers, and purified by solution in distilled water and re-crystallization.

Characters and Tests. - In white crystalline masses or fragments of striated six-sided prisms, colourless, of a peculiar cool saline taste. Thrown on the fire, it deflagrates; warmed in a test-tube with Sulphuric Acid and copper wire, it evolves ruddy fumes. Its solution acidulated with Hydrochloric Acid gives a yellow precipitate with Perchloride of Platinum. Its solution is not affected by Chloride of Barium or Nitrate of Silver.

Preparations. - Trituration. Solution in distilled water for lx, dilute alcohol for 1, and rectified spirit for 3X and upwards.

Reference to Horn. Proving. - Chr. Kr., iv.

Proper forms for dispensing. - 1x and 1, Solution. 1x to 3, Trituration. 3x and upwards, Tincture, Pilules, or Globules.