74 YAENS AND TEXTILE FABEICS. this sample a suitable number of threads are taken and washed to free them from dressing. These short threads (50 instead of 5 m., or 40 instead of 4 yds.) are suspended on the balance, and the yarn number is easily read off. (c) Horizontal Precision Balance. — With… … FIG. 32. Precision balance. removed, the roller of the small balance beam is put in place resting on the larger beam, and the skein to be weighed is suspended on the hook B, the knob A being turned until the beam moves slightly, and the notch E of the beam coincides with the notch D of the index,…
Textile fabrics -- Testing · Yarn -- Testing
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