June 1883 Issue [Article] Sunlight mysteries Download PDF Adjust Share by William Cornelius Wyckoff, This article is only available as a PDF to subscribers. Download PDF Tags 19th century California Experiments O.M. (Ormsby MacKnight) Mitchel Observations S.P. (Samuel Pierpont) Langley Scientific expeditions Solar radiation Spectrum, Solar Sun Whitney, Mount More from William Cornelius Wyckoff The net result. The work of the United States Fish Commission Adjust Share