1892.] NEW YORK ACADEMY OF SCIENCES. 169 



Mordant ; wash, and dye in separate bath 



Weld fi.O gms. 



Chalk 0.3 gm. 



No. 2 (10250). 



A],(S0,)3 0.4 gm. 



Mordant ; wash, and dye in separate bath with 



Weld 7.5 gms. 



1 hour at 80°-90° C. 



o' 



No. 3. 



SnCl, 0.8 gm. 



Mordant ; wash, and dye in separate bath 



Weld 7.5 gms. 



o' 



No. 4 (10249). 

 Same, with 



CuSO, 0.6 gm. 



Chalk 0.8 



(< 



No. 5. 



Same, with ^ " 



FeSO^ . ^ . . . ' . .0.4 gm. 



Tartar 0.3 "" 



Old Gold. 



K.Cr^O, 0.2 gm. 



Mordant and dye in separate bath with 0.6 gm. Weld; add 

 8.0 gms. Chalk to dye-bath. 



Yellow. — Mordant 1-2 hours with 0.4 gm. Al/SOj^; wash, and 

 dye in separate bath with decootion of 5.0-10.00 gms. Weld for 

 20-60 minutes at 80°-9O° C. 



Prepare bath just before dyeing; chop the Weld, put in bags, 

 and boil in soft water ^-1 hour; add 0.4 gm. Chalk before dyeing. 



Brighter yellows are obtained by mordanting with 0.8 gm. SnCl^. 



Also, single bath similar to cochineal scarlet gives bright yellows. 



Yellowish-olive. — Mordant with 0.6 gm. CuSO/, add 0.2-0.8 gm. 

 CaCOg or 0.4 gm. FeSO^ and 0.3 gm. Tartar, with Chalk. 



Fustic. 

 Use water-bath. 

 No. 1 (10169, 10170). 



K^Cr^Oj . . . . ■ . .0.4 gm. 

 Boil 1-li hours ; dye in separate bath at 100° C, 20-80 per cent. 

 Wood. 



This will yield a brownish or olive-yellow. 

 Vol. XI.— 12 



