Investigations of Infra-red Spectra ...

absorption bands absorption spectra acid alcohol Ångström aniline Aschkinass band occurs benzene bolometer brucite calcite carbon Carnegie Publication cell cent CH,-groups cleavage CO₂ compounds dispersion emission bands emission curve emission lines emission spectrum energy curve examined film fluorite galvanometer gases glass groups of atoms heat heater hence hydrogen increase infra-red intensity investigation Large spect large spectrometer maxima maximum metals methyl mica minerals mirror molecule moon mustard oils Nernst glower noticed observed obtained opacity opaque oxide oxygen Paschen Phys Physik plate platinum present pressure quartz radiometer radiomicrometer reflecting power reflection bands reflection curve region rock-salt rock-salt prism Rubens salt selective reflection sensitiveness shifted silicates solid solution specimen spectrometer spectrometer slit substance sulphate sulphur surface temperature thermopile thickness thiophene tion transmission curve transparent tube vacuum-tube vanes vapor visible spectrum water bands water of crystallization wave-lengths µ band μ μ