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A description of the Manly engine : reprinted from Langley memoir on mechanical flight, Smithsonian contributions to knowledge
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Langley memoir on mechanical flight ; pt. 1. 1887-1896, pt. 2. 1897-1903
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752750
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S. P. (Samuel Pierpont) Langley letter to Henry S. Mackintosh
Manuscripts
This letter was written by Langley to Henry S. Mackintosh, an American teacher and author. It is on Smithsonian Institution letterhead. The letter reads as follows: "I am very glad to see your hand again, and perhaps I can best answer your inquiry by enclosing you a copy of a report from the Administrative Assistant in the National Museum, in reference to the feathered cloak. If you wish anything more done through the Museum, let me know, though I rather think you would do quite as well with private parties. Very sincerely yours, S. P. Langley."
mssHM 80278
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The temperature of the moon : (from studies at the Allegheny Observatory.)
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492390
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Memoir of the Hon. Emory Washburn, LL.D. Reprinted from the Proceedings of the Massachusetts historical society, 1879
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286383