48 



CASE in the manufacture of the best rifle powders, and is 



25. imported for this purpose in large quantities from Holland 

 and Belgium. 



Observe specimens of Lo-KA.0, or Chinese Green 

 Indigo, prepared in China from the barks of R. dahuHcay 

 Pall., and R. tinctoria, Waldst. and Kit., and used for 

 dyeing various shades of green. At one time this product 

 was largely employed at Lyons for dyeing silks. 



No. 146. Sap Green, a well-known pigment obtained 

 from the ripe l)erries of the common BUCKTHORN 

 {R. cathartica, L.), and other species, prepared by mixing 

 the fresh jnice of the berries with lime and evaporating 

 to dryness. 



No. 147. Persian or Yellow Berries, the fruits 

 of Rhamnus infectoria^ L., and probably other species. 

 The berries, the size of currants, grow in clusters ; the 

 expressed juice of the young berries is bright yellow and 

 mixed with indigo forms a brilliant and durable green, 

 used in dyeing wool for Oriental carpets, also for dyeing 

 mixed fabrics and by leather-dressers and calico-printers. 

 The fruits are variously known in commerce as " Persian 

 Berries," " Avignon graines," " Spanish Berries," and 

 '' Turkish Berries." 

 CASE On an upper shelf of the first compartment of this 



26. case note fruits of the CORAL Tree {Hovenia dulcis, 

 Thb.), a small tree distributed over China, Japan, and the 

 Himalayas. The fruits, which are about the size of a 

 pea, are borne on enlarged fleshy peduncles which contain 

 a sweet juice and are edible. 



No. 148. Mabee Bark, produced by Geanothtis 

 reclinatus, L'Herit. \_Goluhrina recUnata. Brongn.], a 

 native of South America. The bark is largely used in 

 the West Indies for the preparation of a stomachic drink. 



Note specimens of Chaw Stick or Chew Stick 

 (Gouania domingensU^ L.) from the West Indies. The 

 stem affords an agreeable bitter used locally as a sulistitute 

 for hops in ginger beer. Reduced to powder it forms an 

 excellent dentifrice, and the slender stem cut into short 

 lengths serves the negro as a tooth-brush. Also the stem, 

 curiously flattened in alternating triangular joints, of 

 Golletia c/t^uciata, Gill, and Hook., a Chilian shrub. 



