Sodium Salicylate.

Squill.

Veratrum Viride.

Periones.—See Chilblains.

Periostitis.—See also, Nodes, Onychia.

Calcium Phosphate.

Formaldehyde.

Ichthalbin: internally.

Ichthyol: topically.

Iodide of Potassium, or Ammonium.