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1914

Douglass, AE. 1914. “A Photographic Periodogram Of The Sun-Spot Numbers”. The Astrophysical Journal, XL (No. 3). The Astrophysical Journal, .

Douglass, AE_A Photographic Periodogram of the Sun-Spot Numbers_1914.pdf (7.69 MB)

1892

Douglass, AE. 1892. “Indications Of A Rainy Period In Southern Peru”. Science. Science.

Douglas, AE_Indications of a Rainy Period in Southern Peru_1892.pdf (3.22 MB)