Benjamin Franklin, c. 1781

GENTLEMEN,

I have perused your late mathematical Prize Question, proposed in lieu of one in Natural Philosophy, for the ensuing year, viz. "Une figure quelconque donnee, on demande d'y inscrire le plus grand nombre de fois possible une autre figure plus-petite quelconque, qui est aussi donnee". I was glad to find by these following Words, "l'Acadeemie a jugee que cette deecouverte, en eetendant les bornes de nos connoissances, ne seroit pas sans UTILITE", that you esteem Utility an essential Point in your Enquiries, which has not always been the case with all Academies; and I conclude therefore that you have given this Question instead of a philosophical, or as the Learned express it, a physical one, because you could not at the time think of a physical one that promis?d greater_Utility.

Permit me then humbly to propose one of that sort for your consideration, and through you, if you approve it, for the serious Enquiry of learned Physicians, Chemists, &c. of this enlightened Age. It is universally well known, That in digesting our common Food, there is created or produced in the Bowels of human Creatures, a great Quantity of Wind.

That the permitting this Air to escape and mix with the Atmosphere, is usually offensive to the Company, from the fetid Smell that accompanies it. That all well-bred People therefore, to avoid giving such Offence, forcibly restrain the Efforts of Nature to discharge that Wind.

That so retain?d contrary to Nature, it not only gives frequently great present Pain, but occasions future Diseases, such as habitual Cholics, Ruptures, Tympanies, &c. often destructive of the Constitution, & sometimes of Life itself.

Were it not for the odiously offensive Smell accompanying such Escapes, polite People would probably be under no more Restraint in discharging such Wind in Company, than they are in spitting, or in blowing their Noses. My Prize Question therefore should be, To discover some Drug wholesome & not disagreable, to be mix?d with our common Food, or Sauces, that shall render the natural Discharges of Wind from our Bodies, not only inoffensive, but agreable as Perfumes.

That this is not a chimerical Project, and altogether impossible, may appear from these Considerations. That we already have some Knowledge of Means capable of Varying that Smell. He that dines on stale Flesh, especially with much Addition of Onions, shall be able to afford a Stink that no Company can tolerate; while he that has lived for some Time on Vegetables only, shall have that Breath so pure as to be insensible to the most delicate Noses; and if he can manage so as to avoid the Report, he may any where give Vent to his Griefs, unnoticed. But as there are many to whom an entire Vegetable Diet would be inconvenient, and as a little Quick-Lime thrown into a Jakes will correct the amazing Quantity of fetid Air arising from the vast Mass of putrid Matter contain?d in such Places, and render it rather pleasing to the Smell, who knows but that a little Powder of Lime (or some other thing equivalent) taken in our Food, or perhaps a Glass of Limewater drank at Dinner, may have the same Effect on the Air produc?d in and issuing from our Bowels? This is worth the Experiment. Certain it is also that we have the Power of changing by slight Means the Smell of another Discharge, that of our Water. A few Stems of Asparagus eaten, shall give our Urine a disagreable Odour; and a Pill of Turpentine no bigger than a Pea, shall bestow on it the pleasing Smell of Violets. And why should it be thought more impossible in Nature, to find Means of making a Perfume of our Wind than of our Water?