Botanic Remedies 



VEGETABLE COLORING AGENTS. Red tints are 

 readily produced by COCHINEAL, Coccus, the dried 

 female insect, Pseudococcus cacti, and by CARMINE, 

 made from cochineal; but the color is not durable 

 in some preparations, and a vegetable coloring 

 matter is coming to be more largely used; it is 

 CUDBEAR, obtained from the lichen, Rochella tine- 

 toria, which is stable in acid media. TR. PERSIONIS, 

 of the National Formulary, is its most convenient 

 form to give a bright red color, while the compound 

 tincture gives a reddish brown tint. Five to 10 

 minims to the ounce are used. RED ROSE PETALS, 

 Rosa gallica, in the form of an acid infusion, and 

 the liquid extract of rose, adapted to acid mixtures 

 and those containing tannin. Not adapted to alka- 

 line mixtures, as they turn it green. RED POPPY 

 PETALS, Papaver Rhoeas, are similarly used. SYR- 

 UPUS RHOEADOS is a British preparation thereof. 

 RED SAUNDERS (see under "Kino") is a blood-red 

 color precipitated by mineral acids. ALKANNA ROOT, 

 Alkannatinctoria, is a good red adapted to tinting oils. 



Brown is best obtained by using CARAMEL, or 

 burnt sugar, SACCHARUM USTUM. 



Yellow may be secured by using a trace of tr. 

 hydrastis. SAFFRON (Tr. Croci), Crocus sativus, 

 retains the color well. GLYCERINUM CROCI is an 

 eligible British preparation. TURMERIC, Curcuma 

 longa (Tr. Curcumae), is not a durable color and is 

 turned brown by alkalies. 



TINCTURE OF GRASS makes a pleasing green tint, 

 due to contained chlorophyll. 



HAEMATOXYLIN, q. v., produces a dark tint varying 

 in different strengths. 



FLAVORING AGENTS need no detailed consideration 



15 



