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Page:Popular Science Monthly Volume 65.djvu/27

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23
A NEW METHOD OF RESEARCH.

the comparatively small width of the hydrogen lines, that it will become possible to secure photographs corresponding to different elevations,

N
PSM V65 D027 Calcium flocculi k2 level.png
E Fig. 10.—3h 57m. Calcium Flocculi, K2 Level. Slit at λ 3933 8. W
PSM V65 D027 Hydrogen and calcium flocculi july 7 1903.png
S
Fig. 11.—11h 0m. Hydrogen Flocculi. Slit at Center of Hy. (Bright Eruptive Flocculi West of Spot.)
Hydrogen and Calcium Flocculi, 1903, July 7.
(Scale: Sun's Diameter's 0.290 Meter. )

just as has been done for calcium with the broad H and K bands. This would permit the lower regions to be differentiated from the