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 | Ferrum sulphuratum (alchemy) The alchemical symbol for ferrum sulphuratum, a compound of iron and sulphur. |
 | Nitric acid (alchemy) An alchemical symbol for nitric acid. |
 | Sulfuric acid A symbol used in 18th century chemistry to indicate sulfuric acid. |
 | Mars (alternate) Although this sign isn't often used, in alchemy it is an alternative symbol to indicate the planet Mars. |
 | Go this way Although this symbol strongly resembles the traditional sign of Mars turned 45 degrees to the left, its meaning is very different. |
 | Sulphur (alternate #1) A symbol used to indicate sulphur in alchemical practices. |
 | Wood (alternate #2) An alchemical symbol representing wood. |
 | Red vitriol The symbol used in alchemy and early chemistry to represent red vitriol. |
 | Blue vitriol The symbol used in alchemy and early chemistry to represent blue vitriol. |
 | Iron vitriol The symbol used in alchemy and early chemistry to represent iron vitriol. |
 | Ink (alchemy) In alchemy and early chemistry, this symbol represented ink. |
 | Purify by burning In alchemical practices, this symbol represents a purification process. |
 | Hour (alternate #1) In 17th century French alchemical practices, this symbol was a "time sign" used to represent the period of an hour. |
 | Aqua fortis (alternate) A symbol used in alchemy to indicate aqua fortis, better known as nitric acid. |
 | Sulphur (alternate #2) A symbol used to indicate sulphur in alchemical practices. |
 | Iron filings (alchemy) A symbol used in alchemy to indicate iron filings. |
 | Tin (alternate #2) An alchemical symbol indicating the metal tin. |
 | Tin (alternate #3) An alchemical symbol indicating the metal tin. |
 | Tin (alternate #4) An alchemical symbol indicating the metal tin, specifically tin oxide. |
 | Fixation (alternate) A symbol used in alchemy to represent the process of fixation. |
 | Ferrum auretum An 18th century symbol for ferrum auretum, a yellow iron compound. |
 | Gilded copper (alchemy) An 18th century symbol representing gilded copper, or cuprum auratum. |
 | Distillation (alternate #1) An alchemical symbol indicating the process of distillation. |
 | Distillation (alternate #2) An alchemical symbol indicating the process of distillation. |
 | Sulphur (alternate #3) A symbol used to indicate sulphur in alchemical practices. |
