. Bulletin of the Department of Agriculture. Agriculture; Agriculture. TESTS OF OFFICIAL COTTON STANDARDS FOR GRADE. 11 western Gulf Coastal Plains, and the western Prairie Lands and Pla- teau are as follows: , , , , and , respectively. These figures are not given, however, as a criterion nor with the infer- ence that such close relationship would always prevail. As a matter of fact, material differences in the percentage of waste for the same grade often are found in neighboring sections of the country. A num- ber of the large manufacturers early in the cotton season
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. TESTS OF OFFICIAL COTTON STANDARDS FOR GRADE. 11 western Gulf Coastal Plains, and the western Prairie Lands and Pla- teau are as follows: , , , , and , respectively. These figures are not given, however, as a criterion nor with the infer- ence that such close relationship would always prevail. As a matter of fact, material differences in the percentage of waste for the same grade often are found in neighboring sections of the country. A num- ber of the large manufacturers early in the cotton season each year test carefully various lots from several different sections of the cotton belt to determine which cotton is best suited for their Fig. 6.—The combined visible and invisible waste percentages of five grades of cotton from the different zones. (Textile school tests.) TENSILE-STRENGTH COMPARISONS. (Textile-school tests.) The tensile-strength tests of the yarn spun from the cotton origi- nating in the various zones were made as described on page 6. Table V gives the results of these tests for the different zones and the same grades from each zone. No. 22's yarn was used in each case. Three different twist constants were used in order to determine the relative tensile strength of yarns made from upland cottons with different twists per Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.
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