In Europe the periodicity of the
phenomenon has since been manifested with great regularity.
Another and a like regularly recurring phenomenon is that noticed in the
month of August, the meteoric stream of St. Lawrence, appearing between the
9th and 14th of August. Muschenbrock,* as early as in the middle of the
last century, drew attention to the frequency of meteors in the month of
August' but their certain periodic return about the time of St. Lawrence's
day was first shown by Quetelet, Olbers, and Benzenberg.
[footnote] *Compare Muschenbroek, 'Introd. ad Phil. Nat.', 1762, t. ii., p.
1061; Howard, 'On the Climate of London', vol. ii., p. 23, observations of
the year 1806; seven years, therefore aftr the earliest observations of
Brandes (Benzenberg, '??ber Sternschnuppen', s. 240-244); the August
observations of Thomas Forster, in Quetelet, op. cit., p. 438-453; those of
Adolph Erman, Boguslawski, and Kreil, in Schum., 'Jahrb.', 1838, s. 317-330.
Regarding the point of origin in Perseus, on the 10th of August, 1839, see
the accurate measurements of Bessel and Erman (Schum., 'Astr. Nachr.', No.
385 und 428); but on the 10th of August, 1837, the path does not apper to
have been retrograde; see Arago in 'Comptes Rendus', 1837, t.
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