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Abstract"Of the essays ... the following have appeared in Knowledge: The brightness of starlight, Stellar brightness and density, Holes in the heavens, The stellar universe, A possible celestial catastrophe, and The new cosmogony; and the following in The Observatory: The secular variation of stars, The number of visible stars, and The satellite of Sirius. The rest have not been hitherto published."--cf. Preface.
Mode of access: Internet.