In the case of say wool a very good estimate of fineness cailla made either by cutting the 'fibre to a definite length and counting and weighing a fair number of strands or by projecting the magnified-image of the fibre on to a screen and so measuring the diameter directly. [...] The work absorbed in breaking the test-sample is taken as the difference in height (as read on the scale) to which the pointer is pushed when no sample is clamped in the jaws and the height to which it is pushed when the sample is broken YARN CHARACTERS The details of the measurements carried out on the yarn spun from the samples under test will be described separately. [...] Apart from such characters as colour and speckiness most of the information required inc assessing the quality of a yarn and hence of the fibre from which it was spun is given by the 'quality ratio (single thread breaking load divided by grist and for convenience multiplied by too) considered in conjunction with the coefficient of variation of the weights of standard (2-inch) lengths which i [...] It is only to be expected that the quality ratio of the yarn will be fairly closely related to the ballistic work of rupture of the fibre but it is to be noted that the relation between Q and B/M (Fig. [...] CONCLUSION From the present work it appears possible on the basis of results of the Measurements of fibre characters to classify fibre covering the normal range of quality into ten classes with a reasonable expectation that the error will not exceed two classes.
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