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Updated: September 12, 2025
The proportion of raw silk to the cocoons, appeared, on a variety of trials, to be nearly in this ratio: oz. 10th May, 1751, 55 lbs. cocoons, 1st quality, produced 117-7/8. 11th " " 8 " " " " 6-9 per thread 18-1/2. 13th " " 11 " " " " produced 21-1/2. 15th " " 55 " " 2d " " 109. 18th " " 20 " " " " " 24. 22d " " 15 " " 1st " " 20-3/4. " " " 10 " " 2d " " 13-1/2.
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