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and a still greater increase in Neptune.
Asteroids .–The discovery of these new
planets has been described. At the begin-
ning of the last century it was an immense
triumph to catch a new one. Since photog-
raphy was called into the service by Wolf,
they have been caught every year in shoals.
It is like the difference between sea fishing
with the line and using a steam trawler. In
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