appearances and disappearances of stars. The explosions of a world
which produce them reveal to us, perhaps, how the universes perish
when they become old.

As astronomical observations show the relative frequency of these
rapid destructions, we may ask ourselves whether the end of a
universe by a sudden explosion after a long period of old age does
not represent its most general ending.

Here, perhaps, it will be well to stop, since, entrancing as the
subject may be, we know very little about it, and Doctor Le Bon's
theory affords a limitless field for the reader's imagination.
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A printed version of this book is available from Sattre Press
(http://csky.sattre-press.com). It includes extensive annotations, a
new introduction and all the original photographs and diagrams.