for reproducible precision... every day... RELIABLE Coleman Junior Spectrophotometers Recognized the world over as the most reliable and effective of all tools for spectrophotometric analysis, Coleman Junior Spectrophotometers provide analytical precision with unquestioned speed and economy, but above all they provide them with a day-to-day dependability unequaled by any other spectrophotometer That is why Junior Spectrophotometers have been the choice of over 12,000 industrial, medical and academic laboratories engaged in every conceivable type of chemical analyses. These are the features that give Coleman Junior Spectrophotometers this widespread acceptance: • Basic simplicity of design and operation makes Junior Spectrophotometers easy to use, even by untrained personnel. • Single dial wavelength selection over the full range of 400 - 700 mu; no phototubes or filters to change.
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C O L E M A N MAYWOOO,
• Fixed band-width, without complicated mechanical slit-adjustments, insures continuing analytical reproducibility. • Absence of vacuum tubes or electronic amplifiers means reliable operation, freedom from circuit failures and tube replacements. • Coleman Cuvette-adapter system permits wide selection of round or square cuvettes, unequaled versatility in sample size. Coleman Junior Spectrophotometers are available with either 35 or 20 millimicron band-width. All Coleman Instruments are sealed at the factory for your protection. Write for Bulletin B-240 describing Coleman Junior Spectrophotometers and their accessories.
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For further information, circle number 35 A on Readers' Service Card, page 83 * VOL. 3 0 , N O . 3, MARCH 1 9 5 8
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