Distillation (Alembic)

The sign 🝪 (U+1F76A) is a schematic elevation of the alembic. A lower bowl, the cucurbit, carries a domed capital; a short stroke at the right marks the rostrum. Scribes reduce both vessels to stacked arcs joined by that spur. Newton's notebooks and Gessmann's plates of 1899 keep this form, varying beak length and baseline. Unlike the retort, whose body continues into one bent neck, or the crucible, a plain bowl, the alembic always shows capital and spout. Beside a fire mark or the word distillatio, the strokes depict apparatus, not a planet. Early copies sometimes double the dome or tilt the beak downward to suggest the flow of condensate into a receiver set apart from the fire.

In the laboratory the alembic comprised a cucurbit, usually glass or glazed earthenware, luted to a capital whose internal channel led vapor down the beak into a receiver. Gentle heat from sand bath, water bath, or ash fire drove the more fugitive portion over while salts, earths, and much of the phlegm remained. Assayers and apothecaries used the same separation on mineral waters, wine, vinegar, and solutions of vitriol or nitre, judging fractions by odor, taste, density, and the temperature at which they passed. A sharp, penetrating spirit was collected apart from a later, watery phlegm; a dry caput mortuum stayed in the cucurbit. Repeated cohobation, returning distillate upon its residue and distilling again, increased subtlety. The work is a fractional vapor-liquid separation: parts of differing volatility divide between rising vapor and residual liquid.

Virgo, a mercurial and earthy sign governed in traditional astrology by Mercury, was assigned to distillation because the operation sorts the pure from the impure with discriminating care. Aristotelian physics supplied the mechanism: fire rarefies moisture into vapor, and cold in the capital restores that vapor to water, so the same substance changes place without changing species. Paracelsian chymists read the same facts as a separation of the three principles, drawing a volatile mercury and an inflammable sulphur away from a fixed salt. Symbolically the alembic polarizes above and below, volatile and fixed, spirit and body. What ascends is subtle and medicinal; what remains is the gross caput mortuum, a matrix later reunited with its spirit. The vessel imaged a cosmos in miniature, the capital as heaven receiving what the lower fire sends upward.

Distillation in closed and headed vessels is already described in the Greco-Egyptian technical papyri and in the writings associated with Zosimos of Panopolis, where kerotakis and sublimation apparatus stand beside early stills. Arabic authors, above all Jabirian texts and later writers such as al-Razi, systematized the anbiq, gave proportions for cucurbit and capital, and transmitted the art to Latin Europe as alembicum. Medieval compendia, the Liber de aluminibus et salibus, pseudo-Geber's Summa perfectionis, and books of secrets, treat distillation as a path to aqua vitae and mineral spirits. Paracelsus and his followers made repeated distillation of arcana a hallmark of chemical medicine. Michael Maier's Atalanta fugiens (1618) stages distillation among the mythic operations of the Work, while receipt books keep drawing the two-vessel still.

Within the Magnum Opus, distillation belongs especially to the Albedo, the whitening in which gross blackness is washed, subtilized, and made volatile. After calcination or putrefaction has reduced the matter, the artist circulates it so that a white spirit ascends and a purified body remains. Sequences alternate solution, distillation, cohobation, and coagulation: distillate is imbibed on the caput mortuum until the fixed part itself begins to rise. Records of this stage stress slow heat, clean vessels, and many repetitions rather than one violent fire. Whiteness, whether white earth, coagulated mercury, or clear water, was judged by color and by how readily the substance distilled. The alembic thus carries the Work from dissolution toward a stable white preparation for the later rubedo.

Eighteenth-century reformers retained the alembic as a working still while stripping it of emblematic meaning. Lavoisier's nomenclature treated distillation as a physical separation of substances with fixed composition, not as extraction of occult principles. Berzelius completed the shift by replacing chymical glyphs with alphabetic element symbols and quantitative formulae. The operation survived as fractional distillation, a column exploiting the vapor-liquid equilibrium once managed by cucurbit and capital, now at measured temperatures. Lawrence M. Principe has shown that early modern distillations were genuine laboratory procedures continuous with later chemistry. Unicode placed the sign in the Alchemical Symbols block as U+1F76A, keeping the scribal diagram without its old cosmology.