11 MICEOSCOPIC EXAMINATION OF TEXTILE FIBEES. former consists of a glass slide on which is engraved a mil- limetre graduated into 100 equal parts, each of which is termed a micromillimetre (1 mmm., or p — O'OOl mm.\ A useful form is the ocular micrometer, which consists of either an arbitrary scale… … FIG. 7. Abbe's drawing apparatus. event, the value of the scale must be ascertained by com- parison with an objective micrometer, wrhich is laid on the stage, whilst the ocular scale is inserted in the diaphragm of the eye-piece to determine how many of the divisions of the latter scale coincide…
Textile fabrics -- Testing · Yarn -- Testing
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