0266 - Page sans numérotation - Plate XXVIII / Fig. 1. Section of an ordinary large uric acid calculus, with a little oxalate of lime. Fig. 2. Shows the polished, tuberculated, or granular, exterior which uric acid calculi sometimes presents. Fig. 3. Section of an uric acid calculus, largely made up of coarse crystale disposed in a radiating manner . Fig. 4. A calculus composed of uric acid and urate of ammonia, having a porous and non-laminated structure. Fig. 5. The nucleus and yellow layer are composed of small crystals of uric acid, the intervening part of this and the urate of ammonia, &c. Fig. 6. An uric acid calculus, having the same structure as that shown in fig. 3. Fig. 7. Shows the abrupt transition from uric acid to phosphates, the fusible compound not being in this instance preceded by the deposit of urate of ammonia. Fig. 8. A calculus chiefly composed of uric acid, coated with a thin layer of oxalate of lime,which gives it the external appearance of a mulberry calculus

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