Thisauthor wrote articles for the1911Encyclopædia Britannica
Articles written by this author are designated in the EB1911 by the initials "R. Ad."
Some or all works by this author were published before January 1, 1931, and are in thepublic domain worldwide because the author died at least 100 years ago. Translations or editions published later may be copyrighted. Posthumous works may becopyrighted based on how long they have been published in certain countries and areas.
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