ers up only the centre of the Sun, leaving the outer edge all round uncovered.
This outer edge shows as a bright ring of light, and the eclipse is of the sort known as an "annular" eclipse of the Sun. As the greatest breadth of the annulus can never exceed 1½ minutes of arc, an annular eclipse may sometimes, in some part of its track, become almost or quite total, and vice versâ.
[Illustration: FIG. 4.--ANNULAR ECLIPSE OF THE SUN.]
The idea will naturally suggest itself, what exactly does happen to the inhabitants living outside (on the one side or the other) of the strip of the Earth where the central line of shadow falls? This depends in every case on circumstances, but it may be stated generally that the inhabitants outside the central line but within 1000 to 2000 miles on either side, will see a larger or smaller part of the Sun concealed by the Moon's solid body, simultaneously with the total concealment of the Sun to the favoured individuals who live, or who
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