© C. Degueurce - Musée Fragonard de l’École nationale vétérinaire de Maisons-Alfort

Intestinal stone of a horse

Before the water supply was outfitted in Paris, in the 18th and 19th centuries horses had extremely large digestive stones arising from the accumulation of plants or hair trapped in minerals. Some stones could reach masses of more than 10 kg. They were generally well tolerated until they became lodged in a narrowing of the intestine and thus triggered a fatal occlusion.