Repository: UIHistories Project: Board of Trustees Minutes - 1886 [PAGE 261]

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253 5. In the Saxony wools the measurements abbve and below the average are about equally divided. 6. In the Negretti wools the actual strain varies from an extreme minimum of 1 gramme, (15.435 grains) to an extreme maximum of 11.5Q grammes, (117.49 grains). 7. The averages of the extremes of fineness in Negretti wools, vary from a maximum of 2,695 centimillimetres (TJ^- inch) to a minimum of 1.087 centimillimetres ( T ^T^ inch). The averages vary from a maximum of 2.02 centimillimetres (y-gVy inch) to a minimum of 1.546 centimillimetres ( T ^4 2 inch). The absolute extremes vary from a maximum of 3.25 centimillimetres (^| T inch) to 0.875 centimillimetres (2W0 inch). 8. In the Saxony wools, the absolute extremes of fineness range from 1.00 centimillimetres (2-5V9 inch) to 3.375 centimillimetres (Y^6 inch). The average extremes from 1.208 centimillimetres (-j-gW inch) to 2.847 centimillimetres ( - ^ inch) while the general average is 1.854 centimillitres ( ^ - 9 inch). 9. The stretch in Negretti wool varies from extremes of 5 to 40 per cent, the length tested, their averages being 7 to 30 per cent., the general average being 22 per cent. In the Saxony wrool absolute extremes of stretch vary from 10 to 58 per cent, the length tested, the average extremes from 27 to 53, while the general average amounts to 40 per cent. 10. The ultimate resistance of Negretti wools varies from say 15.000 pounds per square inch to 32,000 pounds per square inch, with an average of 23,579. The averages of moduli of elasticity vary from 67,038 to 167,367, with a general average of 84,917. 11. The average ultimate resistance of the Saxony wools varies from 17,000 to 41,000 pounds per square inch of cross section, with a general average of 23,225 pounds. The averages of moduli of elasticity vary from 45,000 to 111,000, with a general average of 57,000. 12. Hence it appears that the Negretti wools, both as regards fineness and ultimate strength, are more valuable than the Saxony wools. 13. It also appears that they are, with one exception, finer than the Merino wools from the several sections of this country represented in the investigation here described. And as regards ultimate strength represented in modulus of elasticity, if entered in our tables of comparisons they would occupy the third place. If the Saxony wools were likewise entered in our comparison they would occupy the seventh place. These are some of the conclusions to be drawn from the results of our extended study of wools of the United States. Many relations still remain to be developed, not only from these results, but from further experiment and investigation. The field entered upon was comparatively new, and there still remains much to be studied that will yield facts of the greatest scientific and practical value. In the results presented here, and in the detailed report already referred to, both breeders and manufacturers must be able to discover relations that naturally escape the investigator. In the ultimate resistance and moduli of elasticity taken by themselves or im