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A VOYAGE IN SPACE
which we may translate "The Wonderful" ("Al" is the Arabic for "the," and "gol" is the word used for genii or fairies in the Arabian Nights, for instance: though it is mixed up with the word "ghoul," which is not so pleasant in association).
Fig. 33.
This star behaves like the light of some lighthouses, it shines steadily for a time and then goes faint. The steady shining lasts for about three days and then comes the dip. Now the eye is able to see this without any telescope at all; and we can interpret the dip to mean that something comes in front of the light. Imagine two
