Langley, S. P.
Measurement of the Direct Effect of Sun-spots on Terrestrial Climates.
Reprinted from the Astronomical Society's Monthly Notices for Nov. 1876. Soft Cover. Very good in original blue wrappers which bear the raised stamp/seal of the Allegheny Observatory (1860). Some fading to wrappers, crease down the center. Interior is bright and clean, though a tiny bit of spotting to early pages. Langley was a pioneer in air travel, construction, theory, etc. 11 pp. In wraps. Science. SCI/10153. Very Good.