This burns and cauterizes the epidermis or upper skin, till it becomes as hard and thick as leather, and each time the experiment is tried it becomes still easier.

But if, after it has been very often repeated the upper skin should grow so callous and hard as to become troublesome, washing the parts affected with very warm water, or hot wine, will bring away all the shrivelled or parched epidermis.

The flesh, however, will continue tender and unfit for such business till it has been frequently rubbed over with the same spirit.
This preparation may be rendered much stronger and more efficacious by mixing equal quantities of spirit of sulphur, sal ammoniac, essence of rosemary and juice of onions.

The bad effects which frequently swallowing red-hot coals, melted sealing wax, rosin, brimstone and other calcined and inflammable matter, might have had upon his stomach were prevented by drinking plentifully of warm water and oil, as soon as he left the company, till he had vomited it all up again.
This anecdote was communicated to the author of the Journal des Savants by Mr.Panthot, Doctor of Physics and Member of the College at Lyons.
It appeared at the time Powell was showing his fire-eating stunts in London, and the correspondent naively added: Whether Mr.Powell will take it kindly of me thus to have published his secret I cannot tell; but as he now begins to drop into years, has no children that I know of and may die suddenly, or without making a will, I think it a great pity so genteel an occupation should become one of the artes perditae, as possibly it may, if proper care is not taken, and therefore hope, after this information, some true-hearted ENGLISHMAN will take it up again, for the honor of his country, when he reads in the newspapers, "Yesterday, died, much lamented, the famous Mr.Powell.

He was the best, if not the only, fire-eater in the world, and it is greatly to be feared that his art is dead with him." After a couple of columns more in a similar strain, the correspondent signs himself Philopyraphagus Ashburniensis.