An induction coil is any object used to stabilize an edge (or edges) of another pattern without touching. While still lifes and oscillators can be used as induction coils, there are also many induction coils that are not stable by themselves (such as table).
To adjust patterns manually, it is convenient to have the small and useful induction coils handy. However, as the examples show, stabilizing a long edge can usually be accomplished by judiciously placing snakes, blocks and occasionally tubs along its length. Due consideration must be given to their spacing, and especially the overhang at edges and corners. Common short coils follow:
|3, 3 high|
|3, 4 high||-|
|4, 2 high||-||-|
|4, 3 high|
|5, 3 high||-|
- Induction coil at the Life Lexicon