V. Flame spectra at high temperatures.—Part I. Oxy-hydrogen blow-pipe spectra

Abstract

Sir David Brewster, in 1842, appears to have been the first to examine the spectra of salts by means of the oxygen and coal-gas flame, about 180 of which were deflagrated in a platinum spoon (Edinburgh ‘Roy. Soc. Proc.,' vol. 6, p. 145). Professor Norman Lockyer has given us a map of metallic spectra at the temperature of the oxygen and coal-gas blow-pipe (‘Roy. Soc. Proc.,' vol. 23, p. 120). The region observed in the case of twenty-two metals does not extend beyond wavelength 4000; and, although we have both arc and spark spectra for the region up to wave-length 1800, we are still unacquainted with the spectra of elements and compounds obtained by means of flames at high temperatures in the ultra-violet region.