512 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



one of sulphate of cobalt, mixed into a paste with water, and 

 exposed to a red heat. 18 A, June 18, 1872, 336. 



USE OF THE HULL OF THE WALNUT IN DYEING BLACK. 



The green hull of the European walnut (Juglans regia) is 

 turned to account in Greece, and elsewhere in the East, in a 

 way which may, perhaps, suggest a similar application of the 

 hull of our own black walnut. This is used for dyeing black 

 the fur of various kinds of small animals, such as rabbits, 

 cats, and the like. For this purpose the walnut hulls are 

 first crushed, and then the juice squeezed out from the pulp, 

 with the addition of a little water. A small quantity of lime 

 is added, and the dye is then ready. The color is extremely 

 difficult of extraction, and attaches itself very readily to any 

 kind of hair, and is used extensively as a regular hair dye. 

 The coloring matter consists essentially of a soluble alkaloid 

 lately investigated, and known as Begianine. 14 6 r , CCIV., 

 260. 



NEW ANILINE BLACK. 



A new form of aniline black is described "by Reimann, 

 which only needs rubbing up with albumen, and thickening, 

 to be ready for immediate use as a printing color. This, aft- 

 er steaming, becomes permanent, and of a beautiful and deep 

 black. The coloring matter is furnished as a thick black 

 mass, and the intensity of the tint depends somewhat upon 

 the quantity of albumen. This has the same effect in fasten- 

 ing the color as with ultramarine and other body colors ; that 

 is, it incloses the color and keeps it, after its coagulation by 

 steam, permanently fixed to the fibre. 



A mixture of aniline black and albumen can also be used 

 to great advantage as a stamping ink, and applied to the 

 marking of linen and other objects. To render this inefface- 

 able, it is only necessary to subject it either to dry heat or 

 to steam, by which the albumen becomes coagulated. 24 C, 

 1871,49. 



CAMPO-BELLO YELLOW. 



A new color, called campo-bello yellow, is referred to by 

 Reimann in a recent number of the Fdrber-Zeitung as being 

 prepared near Leipsic. The cost of this is quite moderate, 



