achievements, they also refined and popularized a technique that gave rise to a new range of drinks: distillation.
This process, which involves vaporizing and then recondens-ing a liquid in order to separate and purify its constituent parts, has ancient origins. Simple distillation equipment dating back to the fourth millennium BCE has been found in northern Mesopotamia, where, judging from later cuneiform inscriptions, it was used to make perfumes. The Greeks and Romans were also familiar with the technique; Aristotle, for example, noted that the vapor condensed from boiling salt water was not salty. But it was only later, starting in the Arab world, that distillation was routinely applied to wine, notably by the eighth-century Arab scholar Jabir ibn Hayyan, who is remembered as one of the fathers of chemistry. He devised an improved form of distillation apparatus, or still, with which he and other Arab al chemists distilled wine and other substances for use in their experiments.
Distilling wine makes it much stronger, because the boiling point of alcohol (seventy-eight degrees centigrade) is lower than that of water (one hundred degrees centigrade). As the wine is slowly heated, vapor begins to rise from its surface long before the liquid starts to boil. Due to alcohol's lower boiling point, this vapor contains proportionately more alcohol and less water than the original liquid. Drawing off and condensing this alcohol-rich vapor produces a liquid with a far higher alcohol content than wine, though it is far from being pure alcohol, since some water and other impurities evaporate even at temperatures below one hundred degrees. However, the alcohol content can be increased by repeated redistillation, also known as rectification.
Knowledge of distillation was one of many aspects of the ancient wisdom that was preserved and extended by Arab scholars and, having been translated from Arabic into Latin, helped to rekindle the spirit of learning in western Europe. The word alembic, which refers to a type of still, encapsulates this combination of ancient knowledge and Arab innovation. It is derived from the Arabic al-ambiq, descended in turn from the Greek word ambix, which refers to the specially shaped vase used in distillation. Similarly, the modern word alcohol illuminates the origins of distilled alcoholic drinks in the laboratories of Arab alchemists. It is descended from al-koh'l, the name given to the black powder of purified antimony, which was used as a cosmetic, to paint or stain the eyelids. The term was used more generally by alchemists to refer to other highly purified substances, including liquids, so that distilled wine later came to be known in English as "alcohol of wine."
Distillation equipment in a medieval laboratory. The production of spirits began as an obscure alchemical technique known only to a select few.
From their obscure origins in alchemical laboratories, the new drinks made possible by distillation became dominant during the Age of Exploration, as seafaring European explorers established colonies and then empires around the world. Distilled drinks provided a durable and compact form of alcohol for transport on board ship and found a range of other uses. These drinks became economic goods of such significance that their taxation and control became matters of great political importance and helped to determine the course of history. The abstemious Arab scholars who first distilled wine regarded the result as alchemical ingredients or a medicine, rather than an everyday drink. Only when knowledge of distillation spread into Christian Europe did distilled spirits become more widely consumed.
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