Al-Kindi Writes Down the Distillations: Chemistry Aimed at a Product

The same apparatus can serve two entirely different projects, and in the ninth century it did.

Al-Kindi’s treatise on the chemistry of perfume and distillation describes a practical craft aimed at a product, and it stands in deliberate contrast to the alchemical distillation of the Jabirian corpus, which aimed at transmutation.^[1]

Because it determines what counts as success, and therefore what gets written down. An alchemical distillation succeeds if a substance changes into another substance; a perfumer’s succeeds if the result smells right and can be made again next week.

Repeatability is the whole difference. A craft aimed at a product needs quantities, times and temperatures that another person can follow, which is why craft chemistry generates usable recipes and speculative chemistry generates theory.^[2]

The two also fail differently, which is the deeper point. A craft failure is obvious immediately — the batch is wrong and the customer says so — while a speculative failure can always be attributed to an impurity, a wrong hour or an incomplete understanding, and so need never be conceded.^[2]

That there was a trade worth writing for. Nobody compiles operational instructions for a practice nobody is doing, so the existence of the treatise implies practitioners, customers and enough variation between workshops to make a written standard useful.^[3]

It also implies materials arriving from somewhere. Distillation is applied to things, and a treatise on perfume presupposes a supply of aromatics reaching the place where it was written.^[3]

And it implies buyers who could tell one product from another. Instructions precise enough to be worth recording are only worth recording where the difference between a good batch and a poor one is noticed and paid for.^[3]

The number of recipes in the treatise circulates widely and is not supplied here. The study used is a source for the treatise’s existence and practical character, and it is not a source for that count.^[4]

Omitting a number is a peculiar thing to do deliberately and is worth explaining. A specific figure is what readers remember and what other writers copy, so putting one in on the strength of a source that does not carry it would launch it onward with a false warrant.^[4]

The count may well be right. It is simply not established by what is cited here, and a figure that cannot be sourced is not improved by being plausible.^[4]

Al-Zahrawi’s Kitab al-Tasrif, from around the year 1000, gives adornment a treatise of its own and treats it as a branch of medicine rather than as a separate craft.^[5]

Its nineteenth treatise covers hair dyes, depilatories, dentifrices, underarm preparations and solid perfumes rolled and pressed in moulds — an operational range that sits naturally alongside a manual of distillation, and belongs to the same habit of writing practice down.^[6]

They are solid perfumes rolled and pressed in moulds, and the modern description of them as the first lipstick is a later gloss rather than a rendering of the text.^[7]

The gloss is understandable and still wrong. A shaped solid preparation for the body does resemble a modern object, and resemblance is not identity; reading a lipstick out of it is reading our category back into a text that had its own.^[7]

The cost of the gloss is the interesting part. Calling it the first lipstick makes the text sound like an ancestor of a modern product line, when what it actually documents is a medical compendium treating shaped solid preparations as one technique among many.^[7]

How widely the treatise circulated, and whether working perfumers used it or it recorded what they were already doing, is not established here. Both are possible and a manual can be either.^[8]

The reading of adornment as a branch of medicine rather than an appendage to it is also an interpretive judgement belonging to the modern study, not a statement al-Zahrawi makes about his own arrangement.^[9]

The relation between the two works is also unmapped here. A perfume treatise of the ninth century and a medical compendium of the eleventh belong to a shared culture of written practice, and nothing cited establishes that either drew on the other.^[8]