125 Procefs fallowed at AJlracan 



alfo prepare their nefts of eatable fubftances, but, on account 

 of the number of fmall feathers and other impurities mixed 

 with them, are not fit to be ufed. People therefore en- 

 deavour, as much as poflible, to exterminate them, as they 

 fpoil the habitations of the better kinds. They are diftin- 

 guifhed from the latter merely by being larger, and having 

 the legs down to the feet covered by fmall feathers. 



III. The Procefs foollozued at AJlracan to give to Cotton Yarn 

 a Blue, Yellow, or Green Djc. From Neue Nordifche 

 Beytragc, hy Prof < 'for Tall as. 



T 



A H E manufacturers at Aftracan, befides red cotton yarn, 

 the procefs for dyeing of which has been given in the pre- 

 ceding number of this Journal, prepare alfo blue, yellow, and 

 green, which they give out to be dyed by regular dyers. 

 The procefs which they employ is briefly as follows : 



The principal dye is the blue, which is employed both for 

 cotton and fdk. To prepare it, the indigo or blue dye-ftuff 

 is finely pounded, and diflblved in water by a gentle heat in 

 large earthen jars, feven of which ftand in brick- work over 

 the fire-place, at the diftance of about an ell and a half from 

 each other. About two pounds are put into each veffel. 

 Five pounds of the foda or kalalzar, mentioned in the procefs 

 for the Turkey red, finely pounded, together with two 

 pounds of pure lime and one pound of clarified honey, are 

 added to each : when thcfe ingredients have been well mixed 

 the fire is ftrengthened ; and when the whole begins to boil 

 the dye is ftirred carefully round in all the veffels, that every 

 thing may be completely diflblved and mixed. After the 

 firft boiling the fire is flackened, and the dye is fuffered to 

 ftand over a gentle heat, while it is continually ftirred round : 

 this is continued even after the furnace is cooled, till a thick 

 fcum arifes in the neck of each jar, and foon after difappears. 



The 



