| Description | Details of child who, after having a stone cut from his bladder, was discovered with a flint stone shaped like a pistol within. Believes that the boy must have swallowed the flint stone. Re-counts another case of a man who voided a flint stone in his urine.
Partially printed in 'Philosophical Transactions', vol 22, no 266, p 689 |
| Place origin | Aberdeen, Aberdeenshire, Scotland |