Author:Douglas Alexander Spalding
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Articles in Popular Science Monthly
- "Instinct in Young Birds" in Popular Science Monthly, 2 (March 1873)
- "The New Psychology" in Popular Science Monthly, 3 (May 1873)
- "Instinct and Acquisition" in Popular Science Monthly, 8 (January 1876)
Some or all works by this author were published before January 1, 1928, and are in the public domain worldwide because the author died at least 100 years ago. Translations or editions published later may be copyrighted. Posthumous works may be copyrighted based on how long they have been published in certain countries and areas.