Most commonly it is composed of a lithic acid or mulberry nucleus, and an external crust of the fusible calculus.
I have also seen it connected, as lithic acid frequently is, with a tendency to cutaneous disease.
It has been used as a solvent for lithic calculi, and in gout, &c.—Dose, 15 to 30 gr.
Alkalies are thus of use in a tendency to lithic acid deposit.
The deposits in which solvents are appropriate are termed respectively Lithic and Phosphatic.
Excessive indulgence in animal food or in wine may cause an over-secretion of Lithic acid.
A suppression of the secretion of the skin causes a lithic deposit in some cases, as in a common "cold."
Acids dissolve a phosphatic, and Alkalies or their carbonates a lithic deposit, in the body, as well as out of it.
For the solvent passes out along with each successive quantity of the Lithic or Phosphatic matter that is formed and excreted.
Similarly, in Oxaluria, oxalic acid is found there; in Lithiasis, lithic acid in excess.