a series of inscribed or escribed logarithmic spirals.
Once more, then, we may modify our definition, and say that: ãAny plane curve proceeding from a fixed point (or pole), and such that the vectorial area of any sector is always a gnomon to the whole preceding figure, is called an equiangular, or logarithmic, spiral.ã And we may now introduce this new concept and nomenclature into our description of the Nautilus shell and other related organic forms, by saying that: (1) if a growing
structure be built up of successive parts, similar and similarly situated, we can always trace through corôÙreôÙsponôÙding points a