1892.] NEW YORK ACADEMY OP SCIENCES. 171 



No. 10 (1018(5, 10187) (single bath). 

 Use no Tartar. 



Brownish or olive-yellow. — No. 1. 



K,Cr,0, 0.400 gm. 



Boil 1-1^ hours and dye in separate bath 1-1^ hours at 100° C, 

 2.0-8.0 gms. dye. 



Yellow. — No. 2 (single bath). 



1-1^ hours at 80°-100° C. 



A1,(S0J3 0.4 gm. 



H,C,0, 0.2 " 



Wood 2.0-4.0 gms. 



The addition of Tartar deepens, but dulls color. 



No. 3. 



Mordant 1-H hours with 0.8 gm. Al2(SOj3, wash, and dve ^-| 

 hour at 80°-90° C, 2.0-4.0 gms. dye. 



By using 0.2-0.3 gm. SnCl^ with the alum much brighter colors 

 are obtained. 



No. 3. 



Mordant 1-1|- hours with 0.8 gm. SnCl2 crystals and 0.8 gm, 

 Tartar, wash, and dve in separate bath 30-40 minutes at SO^-lOO'-* 

 C, 2.0-4.0 gms. Wood. 



Quercitron. 



Use Flavin ; 1 i^Z. = 16 Quer. 

 Canary-yellow.— ^0. 1 (10194, 10196). 

 Boil ^-| hour in solution of 



SnCl2 0.8 gm, 



H,aO, 0.4 " 



Take out wool and add 0.100 gm. Flavin mixed to a paste; boil 

 5-10 minutes, re-enter wool, and continue to boil -^-l hour. 



Oxalic acid may be replaced by Tartar or Tartaric Acid. More 

 SnClj yields brighter and redder shades. 



Bright orange.— ^o. 2 (10195, 10197). 

 Same as above, using 



Flavin 0,8 gm. 



&' 



Quercitron Bark. 

 Olive-yellow.— ^0. 3 (10198, 10199). 



KjCrOj, 0.3 gm. 



Mordant 1-1|- hours, wash, and dye in separate bath 



Quercitron 4.0 gms. 



