女生小视频

Review: Astrological eggs

The Vortex of Life: Nature鈥檚 Patterns in Space and Time by Lawrence
Edwards, Floris Books, pp 352, 拢19.95

This book has nothing to do with Christopher Hodder-Williams鈥檚 classic
The Egg-Shaped Thing, although there is a certain resemblance between the
leading characters. Lawrence Edwards has written about the geometry of birds鈥�
eggs, pine cones, buds, heart ventricles and even embryos. His book is
an interesting mix of mathematics and natural history, but all overlaid
by an unconventional philosophy.

Edwards begins with some mathematical origami showing how geometrical
transformations can generate forms with an uncanny similarity to eggs,
pine cones and so on. (The book鈥檚 title comes from a vortex involved in
a particularly tortuous procedure.) Just as you are asking 鈥榮o what?鈥�, Edwards
shows that the geometrical forms can fit the natural shapes almost exactly.
If this is just a coincidence, it is a useful one. Edwards employs his mathematics
to analyse shape changes that range from the form of the left ventricle
during a heart beat, to the opening of flower buds. Unfortunately, however,
he gives his work such offbeat interpretations that it is often tempting
to write comments in the margins.

For example, Edwards shows that dormant buds are not as quiescent as
they appear. Measuring them daily, he found that buds pass through a roughly
fortnightly cycle of shape changes. During the cycle, buds relax their form
slightly, as if beginning to open, and then close up again. The pattern
is widespread, appearing anywhere from the leaf buds on beech trees to the
flower buds on primroses, and the cycle is roughly synchronised between
buds on the same plant. Edwards may have discovered the slow ticking of
an internal clock, or possibly there is a hidden 14-day cycle in the plants鈥�
environment. He does not consider either, but links the shape changes to
astrology. The shape of oak buds, for example, correlates with the positions
of the Moon and Mars. Interestingly, high-voltage cables appear to disrupt
the changes in a bud鈥檚 shape. Perhaps, Edwards suggests, 鈥榓n artificial
electric field could act as a screen which isolates the plants from their
cosmic connections鈥�.

Can you cope with that sort of conversation-stopper? If so, the book
makes intriguing reading. The geometrical forms that Edwards generates do
not fit just anything roughly egg or cone-shaped. A narrowing at one end
of the 鈥榚gg鈥�, for example, must be matched by the correct widening at the
other end. So the fact that the geometry often describes natural shapes
almost exactly implies that Edwards鈥� mathematics may shed light on the development
of shape in plants and animals. Unfortunately, you cannot tell if the mathematics
and the biology are linked by reading the book because Edwards writes using
mainly metaphysical rather than biological terms. At one point he proposes
that a 鈥榝ield of form鈥� influences both the natural and the geometrical shapes:
鈥榃hen one compares these two things, the plant reality, and the mathematical
drawing, they are found to be identical in form, because this is the thing
which gave birth to them both,鈥� he writes.

Edwards acknowledges that his arguments owe much to the Austrian philosopher
and scientist Rudolf Steiner. Steiner founded the doctrine of anthroposophy
which aims to restore a person鈥檚 capacity for spiritual perception, and
he also devised teaching methods based on art and drama. People familiar
with Steiner鈥檚 work may find Edwards鈥� writing easier to follow. However,
even if you disagree with Edwards鈥� philosophy, his book may make you look
twice at an egg before you crack it.

Stephen Day is a science writer and biologist.