Investigations of Infra-red Spectra ...

absorption bands amperes anchor ice aragonite Aschkinass Astrophys atomic weight bands of selective bolometer bolometer strip CaCO3 calcite carbon Carnegie Publication cent color complete radiator computed cryolite diameter disk electrical electrical conductors electrodes emission bands emission curve emission spectrum emitted energy curve examined filament film fluorite galvanometer glass graph group of atoms heat hence infra-red instrument intensity isochromatic long wave-lengths Magnesite maxima maximum metallic reflection minerals mirror moon Nernst glower Nernst heater Nichols nitrate observed obtained ohms opaque oxide Paschen Peltier effect period Phys platinum present quartz radiation curve radiometer radiomicrometer reflected energy reflection bands reflection curve reflection spectra region residual rays rise in temperature rock-salt rock-salt prism Rubens selective reflection shift short wave-lengths shows silicates specimen spectrometer slit substances sulphates thermopile thick tion transmission curve transparent ultra-violet vanes visible spectrum watts wire writer