Smithsonian miscellaneous collections . nists, Berlin, pp. , Sebastian 1596, 1602. Voyages of Sebastian Vizcaino. In a chronological history ofthe voyages and discoveries in the South Sea or Pacific Ocean, byJ. Burney, Pt. 2, 1806, London; also in Monarchia Indiana (seeTorquemada). VoN ElCKSTEDT, E. F. 1934. Rassenkunde und Rassengeschichte der Menschheit. Stuttgart 58 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 94 Wegner, R. N. 1927. Die Siriono, der primitivste Volksstamm der Erde. Die Umschau, vol. 31, pp. Durch Inner-Bolivien und Hoch-Peru. Pamphlet, Greifswald
Smithsonian miscellaneous collections . nists, Berlin, pp. , Sebastian 1596, 1602. Voyages of Sebastian Vizcaino. In a chronological history ofthe voyages and discoveries in the South Sea or Pacific Ocean, byJ. Burney, Pt. 2, 1806, London; also in Monarchia Indiana (seeTorquemada). VoN ElCKSTEDT, E. F. 1934. Rassenkunde und Rassengeschichte der Menschheit. Stuttgart 58 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 94 Wegner, R. N. 1927. Die Siriono, der primitivste Volksstamm der Erde. Die Umschau, vol. 31, pp. Durch Inner-Bolivien und Hoch-Peru. Pamphlet, Greifswald; alsoin Mitteil. Naturwiss. Ver. Greifswald, vol. 57, 1930; also in hisZum Sonnentor durch altes Indianesland, Damistart, , Charles 1880. Perou et Bolivie. Paris. WiNSOR, J. 1884-1889. Narrative and critical history of America, vol. 2, p. 304. SMITHSONIAN MISCELLANEOUS COLLECTIONS VOLUME 94, NUMBER i: MOUNT ST. KATHERINE, AN EXCELLENT SOLAR-RADIATION STATION (With Two Plates) BYC. G. ABBOT Secretary, Smithsonian Institution. (Publication 3342) CITY OF WASHINGTON PUBLISHED BY THE SMITHSONIAN INSTITUTION OCTOBER 5, 1935 ^8« £or& (^aitimovt (preee BALTIMORE, UD., U. S. A. I MOUNT ST. KATHERINE,AN EXCELLENT SOLAR-RADIATION STATION By C. G. abbot Secretary, Smithsonian Institution(With Two Plates) For many years the Smithsonian Astrophysical Observatory hasbeen engaged in measuring solar radiation on mountain peaks indesert lands, and computing therefrom the solar constant of radia-tion. By that we mean the intensity of the suns radiation as it wouldbe found by an observer with a perfect instrument, constantly sta-tioned in free space, outside the earths atmosphere, at the earthsmean distance from the sun. Our object in this work is to determineto what degree the suns output of radiation is variable, and whateffects its variations produce on weather. In his Report of the Mount Whitney Expedition, Langleyspeaks strongly of the difficulty of measuring solar radiation any
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