The Astrophysical journal . flame linesmay be accounted for by the reduced temperature of the umbralvapors, the weakening of the spark lines may equally well be attrib-uted to the same cause. This subject, however, is still underinvestigation. It is evident, from Fowlers failure to identify the titanium flutingsin spot spectra, that photography may be considered to offer specialadvantages for the study of the fainter lines and bands. In view of Lockyers early observations, it is odd that he did notadopt the hypothesis that spots are regions of reduced has long held, on the contr
The Astrophysical journal . flame linesmay be accounted for by the reduced temperature of the umbralvapors, the weakening of the spark lines may equally well be attrib-uted to the same cause. This subject, however, is still underinvestigation. It is evident, from Fowlers failure to identify the titanium flutingsin spot spectra, that photography may be considered to offer specialadvantages for the study of the fainter lines and bands. In view of Lockyers early observations, it is odd that he did notadopt the hypothesis that spots are regions of reduced has long held, on the contrary, that at times of sun-spot maximum(when our spectra were photographed) the spot temperature is sohigh as to dissociate many of the elements represented in the solarspectrum. If, as a paper published before the appearance of ourMount Wilson results indicates, he now believes that sun-spots andred-type stars are cooler than the reversing layer, he may have aban-doned or modified his views regarding dissociation in -<
Size: 1834px × 1363px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectspectru, bookyear1895
