. Smithsonian miscellaneous collections. no. 9 SOLAR ECLIPSE I918 ALDRICH 15. l6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 69 RESULTS The results summarized in the tables are graphically shown infigures I, 2, and 3. Figure 1 shows the relation between sky bright-ness and hour angle, figure 2 the total sun and sky brightness andhour angle, and figure 3 the intensity of solar radiation and air mass(secant of the zenith distance). The intensity of sky brightness onJune 8 was nearly double that of June 9 due to the streaks of cirruscloud which prevailed on the former day. On June 9 the sky wascle
. Smithsonian miscellaneous collections. no. 9 SOLAR ECLIPSE I918 ALDRICH 15. l6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 69 RESULTS The results summarized in the tables are graphically shown infigures I, 2, and 3. Figure 1 shows the relation between sky bright-ness and hour angle, figure 2 the total sun and sky brightness andhour angle, and figure 3 the intensity of solar radiation and air mass(secant of the zenith distance). The intensity of sky brightness onJune 8 was nearly double that of June 9 due to the streaks of cirruscloud which prevailed on the former day. On June 9 the sky wasclear and blue during the afternoon up to an hour angle of aboutfive hours. At this time, cirri similar to June 8 spread over the wholesky. This explains the deviation of the last two points on the curveof June 9 (fig. 1). The great deviations in sky brightness early onthe afternoon of June 8 arise from the presence of cumulus cloudsscattered over the sky. By the time the eclipse began the cumuli hadpractically disappeared and the values for the remainder of the dayyield a su
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Keywords: ., bookauthorsm, bookcentury1800, bookdecade1860, booksubjectscience
