Author:Albert J. Leffingwell

Albert J. Leffingwell
(1845–1916)

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Albert J. Leffingwell

WorksEdit

Articles in Popular Science MonthlyEdit

"The Scientific Aspect of Free-Will" in Popular Science Monthly, 16 (April 1880)
"Two Wonderful Instruments" in Popular Science Monthly, 28 (November 1885)

Works by this author published before January 1, 1924 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.