1. The solar atmosphere: an introduction to an account of researches made at the Allegheny Observatory Author(s): Langley, S. P. (Samuel Pierpont), 1834-1906 Publication: [New Haven? : American journal of science and arts?, 1875?] Subject(s): Solar SystemAtmosphere
2. A proposed new method in solar spectrum analysis Author(s): Langley, S. P. (Samuel Pierpont), 1834-1906 Publication: [New Haven] : [American Journal of Science and Arts], [1877] Subject(s): SunlightSpectrum Analysis
3. On the observation of sudden phenomena Author(s): Langley, S. P. (Samuel Pierpont), 1834-1906 Publication: Washington : Published by The Society, 1889 Subject(s): Visual AcuityMotion PerceptionAstronomy -- instrumentation