At a Glance
- Symbol
- “A chemist conducts an experiment for his students.”
- Degree
- 18° Leo (138th of the zodiac)
- Jones Keyword
- Instruction
- Element
- Fire
- Modality
- Fixed
- Ruler
- Sun
- Decanate
- 2nd, sub-ruled by Jupiter
- Phase
- Straight-Forwardness
The Image
At 18° Leo, the picture Elsie Wheeler described in 1925 was simple and exact. “A chemist conducts an experiment for his students.”
These images came through clairvoyantly in one afternoon, which is why they carry the strange specificity of a dream. Read the picture before you reach for the meaning. Here is the method for reading any Sabian Symbol, step by step.
What 18° Leo Means
This degree falls in Leo, a fire sign ruled by Sun, which gives the image a charge of initiative and self-assertion — energy that moves before it explains itself. As a fixed degree it sustains — it holds a position and deepens it rather than starting over.
Its place in the larger cycle is the phase of Straight-Forwardness — Speaking and acting without subterfuge. Read together with the scene, it shows the movement this degree naturally makes.
The Gift and the Shadow
Every Sabian degree has a bright reading and a difficult one — the same image shows both. At its best, 18° Leo expresses instruction as something earned rather than forced — the picture working the way it was meant to.
Its shadow is the same energy out of season: the picture turned rigid — the strength clung to until it becomes a limitation. Holding both at once is how the degree is read honestly — most people live somewhere between the two.
The Keyword: Instruction
Marc Edmund Jones assigned every degree a single keyword as a compression of its meaning. For 18° Leo that word is Instruction. A keyword is a handle, not the whole reading — but it points at the register the degree works in and confirms a reading you reach from the image itself. More on how Jones keywords work →
18° Leo in a Birth Chart
The same degree reads differently depending on which placement sits there. If 18° Leo is your Sun, the image describes how you express and act. On your Moon, it describes your inner life and what you need to feel safe. On your Ascendant, it describes how you arrive — the version of you that walks into rooms. How Sun, Moon and Ascendant symbols differ →
Where This Degree Sits
18° Leo occupies the 2nd decanate of Leo, sub-ruled by Jupiter. On the wider wheel it belongs to the Individualization hemicycle and the act of Stabilization: Consolidation of personality and capacity to function. Its polarity is yang.
Is 18° Leo your Sun? See the image at your degree free — then go deeper. No account.
Start free →- Sun, Moon & Ascendant — three images, not one
- The pattern that runs across all three placements
- A written action plan, mapped to your chart
- Saved as a link for 7 days · download as PDF
- A 12-month forecast from your real transits
- ~25 key moments, each mapped to its Sabian image
- Organized by quarter, with one throughline
Common Questions
What is the Sabian Symbol for 18° Leo?
The Sabian Symbol for 18° Leo is: “A chemist conducts an experiment for his students.” Its Jones keyword is Instruction.
What does 18° Leo mean?
18° Leo is a fire, fixed degree ruled by Sun, in the phase of Straight-Forwardness: Speaking and acting without subterfuge. Its keyword, Instruction, points to its core energy.
Is 18° Leo a good degree?
Like every Sabian degree it has a gift and a shadow — the same image shows both. At its best it expresses instruction consciously; its shadow is that same energy out of season. It is read as a working tendency, not a verdict.
What is the keyword for 18° Leo?
Marc Edmund Jones's keyword for 18° Leo is Instruction.