The second subdivision of functional urinary diseases comprises six chapters: first, on urinary gravel and calculi; second, on the data, showing the comparative prevalency of different forms of urinary deposite, and the order of their succession; third, on the lithic acid diathesis in general; fourth, on the mulberry or oxalate of lime diathesis; fifth, on the cystic oxide diathesis, and sixth, on the phosphatic, or earthy diathesis.
Under the first chapter, we have an account of I. Pulverulent or amorphous sediments; II. Crystallized sediments, or gravel; and III. Solid concretions, or urinary calculi. Of the latter, our author enumerates thirteen species.
1. The lithic acid calculus.
2. The lithate of ammonia calculus.
3. The oxalate of lime, or mulberry calculus.
4. The cystic oxide calculus.
5. The bone earth, or phosphate of lime calculus.
6. The triple phosphate of magnesia-and-ammonia calculus.
7. The calculus, composed of a mixture of the phosphate of lime, and triple phosphate of magnesia-and-ammonia, or fusible calculus.
8. The alternating calculus.