...brighter a given iron line is seen to be, the darker, as a rule, does the corresponding solar line appear. Hence this coincidence must be produced by some cause,...the absorption which the vapour of iron must exert. As this is the only assignable cause of this coincidence, the supposition appears to be a necessary...

...practically certain that these lines have a common cause. ' Hence this coincidence,' says Kirchhoff, ' must be produced by some cause, and a cause can be...the absorption which the vapour of iron must exert. As this is the only assignable cause of this coincidence, the supposition appears to be a necessary...

...practically certain that these lines have a common cause. " Hence this coincidence," says Kirchhoff, " must be produced by some cause, and a cause can be...which form the solar spectrum have passed through the тарог of iron, and have thus suffered the absorption which the vapor of iron must exert. As this...

...practically certain that these lines have a common cause. " Hence this coincidence," says Kirchhoff, " must be produced by some cause, and a cause can be...which form the solar spectrum have passed through the vapor of iron, and have thus suffered the absorption which the vapor of iron must exert. As this is...

...spectrum which coincide with the bright lines of the metals we have named, and therefore he concludes that rays of light which form the solar spectrum have passed through the vapours of these metals, and have thus suffered the absorption which these metallic vipours must exert....

...of light which form the solar spectrum and present the interesting phenomena previously referred to have passed through the vapour of iron, and have thus...the absorption which the vapour of iron must exert. It has been maintained that these iron time possesses a similar constitution. The idea that the sun...

...practically certain that these lines have a common cause. " Hence this coincidence," says Kirchhoff, " must be produced by some cause ; and a cause can be...the absorption which the vapour of iron must exert." " As this is the only assignable cause of this coincidence, the supposition appears to be a necessary...

...cause can be assigned which affords a perfect explanation of the phenomenon. The observed, phenomonon may be explained by the supposition that the rays...the absorption which the vapour of iron must exert. " As this is the only assignable cause of this coincidence, the supposition appears to be a necessary...

...practically certain that these lines have a common cause. " Hence this coincidence," says Kirchhoff, " must be produced by some cause ; and a cause can be...the Absorption which the vapour of iron must exert." " As this is the only assignable cause of this coincidence, the supposition appears to be a necessary...

...can be assigned which affords a perfect explanation of the phenomenon. The observed phenomenon may bo explained by the supposition, that the rays of light...which form the solar spectrum have passed through the vapor of iron, and have thus suffered the absorption which the vapor of iron must exert." To put to...