Measurements of the color of standards for grades of cotton, which were made in the United States Department of Agriculture, are shown in a series of diagrams. These illustrate the relation of the grades to each other in color, how the color may change during a period of years, and color measurements of the original standards, copies of them, and of the standards adopted in 1946 to become effective August 1, 1947.
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References
1.
Nickerson, D. , Color Measurements in Psychological Terms, J. Opt. Soc. Am.21, 643-50 (1931); illus.
2.
Nickerson, D. , A Colorimeter for Use with Disc Mixture, J. Opt. Soc. Am.21, 640-2 (1931) ; illus.
3.
(a) Nickerson, D., Color Measurement and Its Application to the Grading of Agricultural Products, U.S.D.A. MP 580 (March, 1946); illus.
4.
(b) Ibid., p. 22.
5.
Munsell Color Company, Inc., " Munsell Book of Color" (standard library and pocket-size editions, illus.), Baltimore 2, Md. (1929).
6.
Nickerson, D. , Disc Colorimetry, Including a Comparison of Methods for Computing Tristimulus Values for Certain Discs, J. Opt. Soc. Am.25, 253-7 (1935); illus.
7.
U. S. Department of Agriculture, The Classification of Cotton, Misc. Pub.310, 1938.
8.
U. S. Department of Agriculture, Revision of Standards for Grades of American Upland Cotton, Service and Regulatory Announcements No. 150 (BAE), 1936.
