Includes various acids, powders and organic substances using their historical names and believable reactions from the time.

Elements included:

• VTRL: Green vitriol, a naturally occuring ore in the real world.
• OIVL: Oil of vitriol. "Root" acid that combines with SALT and SLTP to produce the other acids.
• SPRS: Spirit of salt. Acid, can dissolve gold weakened by AQFR.
• AQFR: Aqua fortis. Acid, transmutation catalyst.
• SLTP: Saltpeter, a salt-like compound. Grows PLNT.
• TNIN: Tannin. Derived from oak trees in the real world, used to produce INK.
• INK: Indigo coloured ink, stains PRCH. Produced by combining TNIN, WATR and VTRL.
• HIDE: Animal hide. Can be made wet; dries into parchment under pressure.
• PRCH: Parchment.
• SILV: Silver. Corrodable metal. Conducts electricity faster than GOLD. Dissolve into AQFR and add SULF to transmute into GOLD. IRON can be transmuted into SILV using MERC as the active ingredient instead.
• SULF: Sulphur. Flammable powder that naturally produces vapours.
• POLT: Poultice. Solidified mixture of PLNT and SULF. Can heal STKM and cure VIRS.

The script is available from the Script Manager, but as it takes time for changes to be accepted, here is an up-to-date version:

https://gist.github.com/rdococ/87039b56a87dd73548572d560179da05

As of writing, the script manager is still on v2, but version 3 adds several new elements, revamps existing ones and changes most reactions to make them more interesting.