...and its penumbra. But they are so exceedingly faint on the sun's general surface that usually the}' cannot be detected outside the spot-spectrum. This...be noted that in the region included between 6, and bt the single lines appear to be each about half as wide as the components of by, and are separated...

...into lines tends to indicate that the absorption which darkens the center of a sun-spot is prqduced, not by granules of solid or liquid matter, but by matter in the gaseous lorm.«« « Die Flecken sind also Massen in Gasform, also keine Schlacken oder Russmassen. Diese Gasmassen...

...resolution of the spot spectrum into lines tends to indicate that the absorption which darkens the center of a Sun-spot is produced, not by granules of solid...liquid matter, but by matter in the gaseous form.' " We may add that the fine lines in the spectrum of the spot nucleus have been frequently observed...

...indicate that the absorption \vhich darkens the center of a sun-spot is produced, not by granulös of solid or liquid matter, but by matter in the gaseous form.««« Die Flecken sind also Massen in Gasform, also keine Schlacken oder Kussmassen. Diese Gasmassen bewirken...

...resolution of the spot-spectrum into lines tends to indicate that the absorption which darkens the center of a sun-spot is produced, not by granules of solid...liquid matter, but by matter in the gaseous form." Dune> remarks, after quoting the above statements from Young, that " there seems to be no fundamental...

...the spot spectrum into lines tends to indicate that the absorption which darkens the center of the sun-spot is produced, not by granules of solid or liquid matter, but by matter in gaseous form.1 Duner, in his memoir, Recherches sur la Rotation au Soleil (p. 12), describes his confirmation...

...of the spot spectrum into lines tends to indicate that theabsorption which darkens the center of the sun-spot is produced, not by granules of solid or liquid matter, but by matter in gaseous form. 1 Dunér, in his memoir, Recherches sur la Rotation du Soleil (p. 12), describes his...

...the spot spectrum into lines tends to indicate that the absorption which darkens the center of the sun-spot is produced, not by granules of solid or liquid matter, but by matter in gaseous form.1 Dune"r, in his memoir, Recherches sur la Rotation du Soleil (p. 12), describes his confirmation...

...the spot spectrum into lines tends to indicate that the absorption which darkens the center of the sun-spot is produced, not by granules of solid or liquid matter, but by matter in gaseous form.1 Dunér, in his memoir, Recherches sur la Rotation du Soleil (p. 12), describes his confirmation...

...intense the spot, the more distinctly the fine lines come out, both the bright and the dark ; and so far as I have been able to make out yet, there is...it may be noted that in the region included between 6t and bt the single lines appear to be each about half as wide as the components of 6,, and are separated...