216 DR. BENCE JONES ON THE SOLUTION OF CALCULI BY ELECTRICITY. 
Explanation of the Plate. 
PLATE XIV. 
Representing’ the exact size of the calculi and the extent of action. 
Fig. 1 (a). Uric acid before it was acted on. 
(b). The same after action. 
Fig. 2. The electrodes of the exact size and shape used. 
Fig. 3. Uric acid calculus acted on in the nitre solution. 
Fig. 4. Phosphatic calculus in the same solution. 
Fig. 5. Piece of marble in solution of nitre. 
Fig. 6. Piece of marble in solution of Glauber-salt. 
Fig. 7. Phosphatic calculus in a more dilute solution of nitre. 
Fig. 8. Uric acid calculus in a more dilute solution of nitre. 
Fig. 9. A calculus as moist as when taken from the bladder, acted upon in nitre with 
larger electrodes. 
