Canon of Bridlington.

Containing His Philosophical Accurtations in the makeing the Philosophers Mercury and Elixirs.
London, Printed for William Cooper, at the Pelican in Little Britain. 1683.

The Whole Work of the Composition of the Philosophical Stone, of the Great Elixir, and of the first Solution of the gross Body.

First take 30 pound weight of Sericon or Antimony, which will make 21 pound weight of Gum, or near thereabouts, if it be well dissolved, and the Vinegar very good, and dissolve each pound thereof in a Gallon of twice distilled Vinegar when cold again, and as it standeth in Dissolution in a fit Glass Vessel, stirr it about with a clean Stick very often every day, the oftner the better, and when it is well moulten to the bottom, then filter over the said Liquors three several times, which keep close covered, and cast away the Feces, for that is superfluous filth which must be removed, and entreth not into the Work but is called Terra damnata.

The Making of our Gum or Green Lyon.

Then put all these cold Liquors thus filtered into a fit Glass Vessel, and set it into Balneo Mariae to evaporate in a temperate heat, which done our Sericon will be coagulated into a green Gum called our green Lyon, which Gum dry well, yet beware thou burn not his Flowers not destroy his greeness.

Это ведь не химический, а алхимический рецепт, поэтому не следует читать его буквально. В этом описании, Рипли приводит две материи (серикон и сурьма), имеющие специфические свойства и приготовленные заранее, одна из которых - сурьма, имеет сходство с обычной сурьмой, но не является ею.

Ради опыта, попробуйте растворить обычную сурьму в уксусе (дистиллированном, холодном, горячем).

Серикон, философская материя, являющейся базовой составляющей для приготовления "растворителя" (в опытах Рипли).
Для изучения вопроса, лучше обратиться к Вейденфильду "Секреты Адептов".

Вот еще немного общей информации:

The first paper was given by Jennifer Rampling (University of Cambridge/Scaliger Instituut, Universiteit Leiden), entitled ‘“Which masters call sericon”: the evolution of an alchemical practice, 1471–1678’. Dr Rampling traced the history of a mysterious alchemical substance, ‘sericon’, in order to examine one problem faced by historians of alchemy – the difficulty of isolating and tracking changes in alchemical ideas, practices and nomenclature over time. Sericon is named as the main ingredient in several fifteenth-century English recipes for the ‘vegetable stone’, an alchemical product capable of preserving and restoring health, and (following further procedures) able to transmute metals. However, both the identity of sericon, and the alchemical practice it represented, were reinterpreted between the fifteenth and seventeenth centuries. In the Medulla alchimiae (1476) of George Ripley, and other works of the same period, sericon denotes red lead, which is dissolved in wine vinegar. Throughout the sixteenth century, ‘sericonian’ alchemy continued to be read as a process using lead and vinegar. However, competing interpretations also evolved, as early modern readers, struggling with the precise nature of ‘sericon’, tried other readings: verdigris, minium of copper, or – most commonly – antimony.

The shift is apparent in two interpretations of the same alchemical poem, the Vision of George Ripley. The first, made in 1577 by Samuel Norton, gives a standard sericonian reading using red lead and vinegar. The second, made in the 1650s by the Bemuda-born alchemist George Starkey, interprets the process very differently. Rather than a recipe for the vegetable stone, Starkey describes a mineral elixir, made using antimony and used for transmutation. Dr Rampling argued that such textual transmutations reveal the attempts of later practitioners to make practical sense of authoritative sources. Over time, the original practice of sericonian alchemy was eclipsed by other methods and materials. This eclipse is one reason why we find few traces in modern scholarship of either sericon or the vegetable stone.

http://www.ambix.org/index.p....emid=15

This our Antimonial Compound is only to be revealed to the Children of Art, who firmly believe the constant truth thereof, and whom in all fraternal love and charity we say, that it is made of one Sulphur, and of two Mercuries, which otherwise by the wise Philosophers are called, the Sun, Moon, and Mercury, or as some of them will more plainly have it, Salt, Sulphur, and Mercury, which are the three several and distinct substances and bodies, although for the most part we term them but one Thing, because in the conclusion of our work they make but one Thing, that is our admirable Elixir, and they have alone original, and tend altogether but to one end. For if we had not in our Work a triune aspect of these Planets, and did not begin it with a Trinity, all would be lost labour and inutilous profile. Что он вводит в заблуждение?

Рипли, как и другие Адепты не вводит в заблуждение и не обманывает. Это описание философских материй, на примере привычных веществ - сурьмы, селитры, нашатыря и так далее, для отображения их определенных свойств и характеристик.
Всегда нужно помнить, что Адепты запрещали трактовать их сочинения буквально и в особенности, это касается названий и терминов.