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Download RAW file: https://library.csbe-scgab.ca/docs/journal/12/12_1_52_raw.pdf
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Description: For experimental work in apple breeding it is important to know the relative amounts of certain band width of radiant energies reaching the fruit. Instantaneous measurements which are recorded with different light meters are laborious and unless a large number of readings are made throughout the growth season the records have a limited value. In the study of color formation in apples it has been found by different authors (1, 2, 3, 4) that the blue (450 nm), green (550 nm) and red (6600 nm) wavelengths are of prime importance. Other wavelengths have little effect in color development. Therefore the amount of energy in an integrated form received separately at these three wavelengths during a growth season can simplify evaluation of their effect. An instrument is described where three wavelengths are integrated electronically and the information stored by separate electromechanical counters.

Keywords: a three channel integrating photometer
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Citation: Brach, Eugene J., St. Amour, G. F. and W. Mason 1970. A THREE CHANNEL INTEGRATING PHOTOMETER. Canadian Agricultural Engineering 12(1):52-54.
Volume: 12
Issue: 1
Pages 52 - 54
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Date: 1970
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Coverage: Canada
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