Lost inventions

incendiary weapon used by the Eastern Roman (Byzantine) Empire developed c. 672

type of steel used in Middle Eastern swordmaking

thumb|Antonio Stradivari, by Edgar Bundy, 1893: a [[romanticized image of a craftsman-hero|upright=1.3]]

large fulcrum based pole with rope and anchor, by hooking ship and applying weight at other end, lift is applied to the vessel capsizing and scuttling it.

theoretical weapon

thumb|Arsenal of ancient mechanical artillery in the Saalburg, Germany; left: polybolos reconstruction by the German engineer Erwin Schramm (1856–1935) thumb|A modern reconstruction of the repeating "polybolos" catapult of Dionysius of Alexandria, in Museum of Ancient Greek Technology|Kotsanas Museum of Ancient Greek Technology, [[Athens, Greece.]] The polybolos (the name means "multi-thrower" in Greek) was an ancient Greek repeating ballista, reputedly invented by Dionysius of Alexandria (a 3rd-century BC Greek engineer at the Rhodes arsenal,) and used in antiquity. The polybolos was not a cr

thumb|270px|White sands test sample, owned by Thermashield, LLC

Italian naturalist

thumb|right|Elaborately gilded drug jar for storing mithridate. By Annibale Fontana, about 1580–1590. Mithridate, also known as mithridatium, mithridatum, or mithridaticum, is a semi-mythical remedy with as many as 65 ingredients, used as an antidote for poisoning, and said to have been created by Mithridates VI Eupator of Pontus in the 1st century BC. It was one of the most complex and highly sought-after drugs during the Middle Ages and the Renaissance, particularly in Italy and France, where it was in continual use for centuries. An updated recipe called theriac (Theriacum Andromachi) was k

Dutch computer scientst

alleged lost invention