DYEING BLACK, PURPLE, AND GREEN. 79 



walnut, for half an hour, together with a quarter 

 of an ounce of the material to be dyed. Take it 

 out, cool the liquor, and add acid as before. Re- 

 insert feathers, or fur, &c., and boil them for 

 another half hour. Rinse and dry as usual. For 

 cinnamon and fiery brown colours, dye in the 

 above fluid hackles, pig's hair, and so forth, that 

 have been already dyed yellow. The fiery brown 

 will require more ingredients in the fluid than the 

 cinnamon colour. 



For Black. — Water as before, in which boil 

 two handfuls of logwood one hour; then add a 

 little sumach and elder bark, and boil for half an 

 hour longer. Next put in your feathers, &c., 

 and boil another half hour ; take them out, cool 

 your liquor, and add acid ; dissolve a bit of cop- 

 peras the size of a nut, and adding a little argil 

 and soda, boil again for half an hour. Take out 

 your feathers, fur, or hair occasionally, as ex- 

 posure to air during the process of dyeing tends 

 to promote and fix the black colour. 



A mixture of blue and red dyeing liquor boiled 

 together, and afterwards cooled, and acid added to 

 it, will produce a purple colour. 



A mixture of blue and yellow dyeing liquor 

 will produce, in accordance with your varying 

 and modifying it, greens of all shades. 



