Horseshoe to the modern hoof boot. Historians differ on the origin of the horseshoe. Because iron was a valuable commodity, and any worn out items were generally reforged and reused, it is difficult to locate clear archaeological evidence. Although some credit the Druids, there is no hard evidence to support this claim. In 1897 four bronze horseshoes with what are apparently nail holes were found in an Etruscan tomb dated around 400 B.C. The assertion by some historians that the Romans invented the "mule shoes" sometime after 100 BC is supported by a reference by Catullus who died in 54 BC.
Sausage casing Sausage casing Casing, sausage casing, or sausage skin is the material that encloses the filling of a sausage. Natural casings are made from animal intestines; artificial casings, introduced in the early 20th century, are made of collagen, cellulose, and extruded casings. Natural sausage casings are made from the sub-mucosa, a layer of the intestine that consists mainly of naturally occurring collagen. In Western European cuisine, most casings come from pigs, but elsewhere the intestines of sheep, goats, cattle and sometimes horses are also used. To prepare the intestines as casings, they are flushed, scraped and cleaned with water and salt