[ 175 ] 116 



Quantities of silk yielded by various parcels of cocoons. 



Eight pounds of cocoons, (16 oz. lo the pound,) of the finest quali- 

 ty, produced from IG to ISi ounces of silk. 



Eight pounds of the finest quality produced from 16 to ISj ounces 

 of raw silk — 6 to 9 cocoons per thread. 



Eleven pounds produced from 19 to 21-2- oz. avoirdupois, from 6 to 

 9 cocoons per thread; another parcel, same weight, gave the same 

 quantity of silk. 



55 lbs. of the second qualit}^, produced 109 ounces of raw silk. 



55 ibs. of the first quality, 12 to 16 cocoons, produced 1171 ounce*- 

 avoirdupois, which is about 16 per cent, less than the last parcel. 



15 lbs. green cocoons, best quality, produce - 20| oz. 



20 lbs. second quality, (not well sorted,) - - 24 



15 lbs. best green cocoons, produced - - 202 



10 lbs. second quality, - - - - 13| 



'11 lbs, best cocoons, produced - - - 44* 



150 ounces (Italian, 28 oz. to the lb.) will yield 11 oz.t the thread 

 of from 5 to 6 cocoons. 



12 lbs. cocoons, 3,300, will make 16 ounces of silk, and 8 ounces of 

 flos.:!: 



Mrs. Willlams§ obtained nearly one ounce and a half from 244 

 coroons. Miss Rhodes]; had, on an average, one ounce from 360 

 cocoons, not including flos, and eleven ounces from 4,000 worms. She 

 says that Mrs. W. included the flos in her product: had Miss R. 

 done so, twenty-five instead of eleven ounces might have been had. 

 Thirty thousand produced five pounds avoirdupois. If troy weight 

 had been used, 21,600 would only have been required. One thousand 

 two hundred and seventy, gave her nearly four ounces of silk. Two 

 thousand eight hundred and ninety-three, produced exactly half a 

 pound of silk, and somev^hat more than a quarter of a pound of waste 

 silk, or tow: on an avei-sge, 360 cocoons yielded an ounce. Mr. 

 Swayne calculates, from the produce of 50 cocoons reared by him, 

 that 13,405 would have yielded five pounds of raw silk.lF Twelve 

 thousand produced 5 lbs,** 



10 or 11 lbs. (French, 12 oz. to the lb ) are required to make one 

 pound of silk thread, called tram, of from 8 to 20 fibres: 13 lbs. made 

 one pound of organzine.tt 



15 or 16 lbs. gave one pound of silk,"}:;! 



1 5 lbs. yielded one pound and a half silk, according to Dandolo. 



* From H.ibersli.iTn's MS. Journal of tlie silk culture in Georgia. 



•\ Trans. Amtr. Phil. Soc. vol. 2, p. 366. 



r^ Pullein, p. 182. § Trans. Soc Arts, London, vol, 2, p, 154, 



II Trans. Soc. Arts, London, vol. 4, p. 149, 



% Trans. Soc. Arts, London, vol. 10, p. 181. 



** Trans Soc. Arts, London, vol. 8, p 165. The secret of t/iis great productioiv, 

 for which the cultivator, Bertczen, an Itahan, received the prcrmuni olFered by the 

 Society, was never divulged. 



j-j- Delonchamps, Essai, Sec. p. 77. iA Delalauze, Traite, ?cc. p. 290 



