1892.] NEW YORK ACADEMY OF SCIENCES. 165 



No. 10052. Same, using 0.1 dye, 0.1 Tartar, 0.2 ee. Spirits. 



No. 2 (10061, 10062). 



FeSO, 0.8 gm. 



Tartar 0.2 " 



Boil I hour ; talie out, wash, and dye in separate bath for 1 hour 



Cochineal ...... 1.2 gms. 



Cochineal crimson. 



A],(S0J3 0.4 gm. 



Tartar 0.5 " 



Mordant ; wash and dye 1-1^ hours 



Cochineal 0.8 " 



Scarlet.— ^0. 1. 



Mordant 1-1^ hours with 0.6 gm. SnCl^, 0.4 gm. Tartar; wash, 

 and dye in 0.5 gm. Cochineal 1-1 j hours; enter wool in' mordant- 

 ing and dye-baths at 50° C. and raise gradually to boiling. 



No. 2. 



Bath i full of water. 



H.CjO, 0.6 gm. 



SnCi, 0.6 " 



Cochineal 0.5 " 



Boil 5-10 minutes; fill bath with cold Jifi; introduce wool; 

 heat to boiling |-] hour ; boil ^ hour. 



Use SnClj in solution. A moderate amount of HCl is advan- 

 tageous. ' 



V 



Cochineal Spirits. — No. 10050. 



Cochineal (10014) .... 1.000 gm. 

 Tin Spirits (10040) .... 0.100 " 



Water, dist 1.5 liters. 



Mix the Cochineal (ground) with water to a thin paste; add Tin 

 Spirits, dilute with water, heat to boiling, and continue 15 minutes; 

 then cool to 180° F., enter wool, raise to boiling, and continue for 

 1 hour, or until the bath is exhausted; allow to cool in the bath, 

 then take out and wash in warm water. 



No. 10059, 10060. 



Cochineal with K^Cr^O. 0.2 gm. and 0.3 gm. H.^SO^ cone, gives 

 purple. 



Cochineal criynson. — No. 1 (10053). 



Al3(SOj3 0.4 gm. 



Tartar 0.5 " 



Boil 1-H hours. 



