The Spectroscope and Its Applications

absorption lines absorption spectrum Aldebaran Ångström application arrangement astronomers atmosphere Balfour Stewart band black lines blue bright lines Bunsen chromosphere coincident collimating lens colour comet continuous spectrum dark lines deal dense determine direct-vision electric lamp electric spark examine experiment F line fact flame Fraunhofer lines gas or vapour gaseous gases give glass green Huggins hydrogen lines instance instrument iron Kirchhoff lens line of hydrogen lithium magnesium vapour metal minimum deviation nebulæ Newton number of prisms observing telescope observing the spectrum obtained Orionis perfectly easy pressure Prof prominences radiation rainbow band ray of light refracted refrangibility seen showing shown in Fig slit sodium lines sodium vapour solar prominences solar spectrum solid or liquid spec spectra spectrum analysis Spectrum of carbon star spectroscope strontium substances sun-spot sunlight surface thing three prisms trum tube velocity violet visible white light Wollaston yellow