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results. Subsequently Weiss, of Vienna, iden-
tified the meteor shower of April 20th (Lyrids)
with comet 1861. Finally, that indefati-
gable worker on meteors, A. S. Herschel,
added to the number, and in 1878 gave a list
of seventy-six coincidences between cometary
and meteoric orbits.
Cometary astronomy is now largely in-
debted to photography, not merely for ac-
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