The definition of distillation in the 15th century included filtration

The Liber de arte distillandi de simplicibus is a 15th-century reference work on material transformation techniques. At that time, the concept of distillation also encompassed filtration and circulation, methods perceived as purification processes. To carry out his manipulations, the author Brunschwig used an assembly comprising a brick furnace and a cucurbit topped with a head called a rosenhut.