“…Other new spectrophotometers include an automatic photoelectric Soviet instrument (446), a recording instrument with double monochromator (148), a grating instrument for the ultraviolet and visible (448), an instrument which displays on a cathode-ray tube the differences between the absorption spectra of the unknown mixture and the known reference mixture (110), and a new model, just announced, of the General Electric recording instrument (167).…”
Section: Physicsmentioning
confidence: 99%
“…Littrow-type spectrometers have been improved (512, 624) while the double-beam type has been worked on (107,126,241,444,506). The Walsh multiple monochromator system has been described and refined (107, 228, 248-250, 448,550,621,622,625,626).…”
“…Other new spectrophotometers include an automatic photoelectric Soviet instrument (446), a recording instrument with double monochromator (148), a grating instrument for the ultraviolet and visible (448), an instrument which displays on a cathode-ray tube the differences between the absorption spectra of the unknown mixture and the known reference mixture (110), and a new model, just announced, of the General Electric recording instrument (167).…”
Section: Physicsmentioning
confidence: 99%
“…Littrow-type spectrometers have been improved (512, 624) while the double-beam type has been worked on (107,126,241,444,506). The Walsh multiple monochromator system has been described and refined (107, 228, 248-250, 448,550,621,622,625,626).…”
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