1892. ] NEW YORK ACADEMY OF SCIENCES. 171 
No. 10 (10186, 10187) (single bath). 
Use no Tartar. 
Brownish or olive-yellow.—No. 1. 
K,Cr,0, 0.400 gm. 
Boil 1-14 hours and dye i in separate bath 1- 1A hours at 100° C:, 
2.0-8.0 gms. dye. 
Yellow.—No. 2 (single bath). 
1-14 hours at 80°-100° C. 
Al,(SO,), . 0.4 gm. 
CG; : : : : EHO ites 
Wood ; . 2.0-4.0 gms. 
The addition of Tartar deepens, but dulls color. 
No. 3. 
Mordant 1-14 hours with 0.8 gm. Al,(SO,),, wash, and dye 3-3 
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 1-14 hours with 0.8 gm. SnCl, erystals and 0.8 gm. 
Tartar, wash, and dye in separate bath 30-40 minutes at 80°-100° 
C., 2.0-4.0 gms. Wood. 
- QUERCITRON. 
Use Flavin; 1 Fl. —16 Quer. 
Canary-yellow.—N 0. 1 (10194, 10196). 
Boil 3—? hour in solution of 
SnCl, : : : : - =) O38) am, 
H,0,0, 
Take out wool and add 0.100. em. Flavin mixed toa paste; boil 
5-10 minutes, re-enter wool, and continue to boil 3-1 hour. 
Oxalic acid may be replaced by Tartar or Tartaric Acid. More 
SnCl, yields brighter and redder ‘shades. 
Bright orange.—No. 2 (10195, 10197). 
Same as above, using 
Flavin. : : : : poses gral 
Quercitron Bark. 
Olive-yellow.—No. 3 (10198, 10199). 
EK CrOe 4: 2) Or El. 
Mordant 1-14 hours, wash, and dye i in separate bath 
Quercitron ; : : . 4.0 gms. 
