Volume 65: Macarthur-Onslow correspondence, 1846-1929: No. 408
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IMPORTANCE OF BEST METHODS
[Large Cocoon shape with letter A inside]
[Small Cocoon shape with letter B inside]
The above diagrams shows cocoons grown from the same eggs - A by a skilled and careful grower, B by a careless one. B produced from 1/4oz. of eggs only one-tenth of the amount of silk produced by A. From 220 to 240 good cocoons should weigh a lb.; of poor ones it may take 700 or 800, or even 1,000.
Another grower says that a number of worms, that in the hands of a careless manager will yield 100 grains of silk after a rearing of thirty-four days, can, by judgment and skill, be made to