Caption: Board of Trustees Minutes - 1886
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243 For a given percentage of stretch, the modulus of elasticity will increase with increase of ultimate resistance, and conversely for a given ultimate resistance it will decrease with an increase in the percentage of stretch. The greater the ultimate resistance required to produce a given stretch in the fibre, the greater must be the modulus of elasticity. Hence we have here an expression for the ultimate economic value of the staple that will admit of almost absolute comparison between wools of the same kind at least, and *even to a large extent between all kinds, or between wool and other materials. If we arrange the wools of the breeds we have studied in the order of their moduli of elasticity from highest to lowest, they range as follows: Modulus of elasticity. 114315 102100 101681 95636 88214 87630 BEEED. Southdown Merino. Leicester Xiincoln Cotswold Oxforddown A Cotswold-Merino cross examined has a modulus of elasticity of 109953. The following table will illustrate the method of collecting all the general averages to show the relations between the results of the tests, and the breed, sex, and portion of fleece from which the sample was taken. At the top of this table we present these general averages for the several breeds studied, and for all samples examined. Below this we present the averages for Merino wool, showing relation between sex and portion of fleece, and the qualities and data represented. Averages of all Results for each Breed. Length of fibreinches No. of samples tested Stretch—per cent Strain—grams .. FINENESS. b BEEED. eg 3 S" C H D IP p . 1X^ 8 1 ^ oo hj 1 l~r! II oo •-•.or P 88 a P ^& r-t'& Cotswold Leicester Lincoln T 8outhdow n Hampshire Oxford Merino 109 1 36 46 2 30 204 5.156 9.75 3.785 1.351 2.188 2.647 1.502 4.196 3.879 3.707 2.936 3.298 4.365 2.131 1.6519 1.5271 1.4594 1.1559 1.2984 1.7185 0.8389 30.44 28.70 25.66 12.78 30.43 7.35 35.45 27.663 28. u5 2*5.201 35.35 29.876 22.95 23.181 33.05 28.70 25.554 25.897 31.272 88.214 28.522 101,681 33.807 95.636 26.286 114.315 28.918 87.630 29.302 102.100
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