00 Orrery
Orrery
Instruments for
the invisible.
In 1704 a London clockmaker built a brass model of the solar system, because the solar system itself refuses to be looked at all at once. Every instrument since has run the same trick: take something too large, too fast, or too faint to see, and give it a body you can put your hands on.
This page is four of them, rebuilt in a browser — and the field of light behind this text is the first.
- Made
- 1704
- By
- John Rowley
- Of
- Brass, mahogany, clockwork
- Shows
- Orbits, at the wrong scale, on purpose
01 Schlieren
Air has a shape.
You just can't see it.
In 1864 August Toepler slid a knife-edge into a beam of light and found he could photograph the warm air rising off a candle. Heat bends light by a hair; block half of what's bent and the difference becomes a picture.
It is how we first saw a bullet's shockwave, a person's breath, the plume coming off a hand. The field behind this text runs the idea backwards — a noise volume standing in for moving air, visible only because something luminous is caught in it.
- Made
- 1864
- By
- August Toepler
- Shows
- Density gradients in transparent fluid
live · your machine
- renderer
- detecting…
- points
- —
- frame
- —
- viewport
- —
- formation
- —
- elapsed
- —
measured here, sent nowhere
02 Harmonograph
Two pendulums,
a pen, and patience.
Hugh Blackburn hung one pendulum from another in 1844 and let the pair drag a pen across paper. What falls out is the ratio between their swings, drawn rather than calculated: 3:2 closes into a clean loop, 3.005:2 opens into a rosette that turns forever.
Nothing in the figure is decorative. Every line is a consequence of two numbers and friction. This one draws from a fresh seed whenever you ask.
- Made
- 1844
- By
- Hugh Blackburn
- Shows
- A ratio, as a line
03 Spectroscope
Then they hand you
the dials.
Kirchhoff and Bunsen aimed a prism at a flame in 1859 and found that every element burns its own fixed set of lines. Overnight you could name the contents of something you would never touch. A star, for instance.
These write straight into shader uniforms on the next frame. Push one to its limit and the picture breaks — which is the honest behaviour of an instrument, and the reason they're here.
- Made
- 1859
- By
- Kirchhoff & Bunsen
- Shows
- What a thing is made of, from its light alone
04 Coda
Every instrument is an argument
that something is there.
The orrery was wrong about the distances. The schlieren image is a shadow of a derivative. The harmonograph is friction pretending to be mathematics. Not one of them shows you the thing — they show you a shape the thing makes, and we agreed that was close enough.
This one is four files and a font folder, served as flat bytes from a single small server. It models nothing at all, which may be the only honest kind.