11 



f 





Gums, 153 



PersiccB ; — Plum-tree f/um, G. pnini. Substituted for gum Arabic 

 by country practitioners ; differ, however, in their chemical 

 quahties from that gum, being what the chemists call cerasine or 

 tragacanthine. 



East India gum, Boif/ol yum, T'ldlam pisin. From the wood 

 apple tree, Feronia elephantum : answers better for mixing colours 

 than gum Arabic. 



Amsa, Kumarkuni. Opaque ; sold in Upper India : used in 

 ozsena. 



CoTTON-TUEE GUM. Froni Bombax pentandrum : used with 

 spices in bowel complaints. 



Olive-tree gum, G. oVivcb. Contains olivile. 



Lichen gum. Several species of lichen yield, by infusion, or 

 decoction in water and evaporation, a gum similar to gum Arabic, 

 and which may be applied to the same uses ; as Lichen coralloides, 

 which yields about 141b. by the cwt. ; L. esculentus about 13 ; L. 

 pulmonarius, and L. farinaceus. 



Hyacinth gum. j\Iay be obtained from the roots of Hyacin- 

 thus non scriptus, common wild hyacinth or harebell ; formerly 

 used by fletchers to glue feathers to arrows. 



Logwood gum. In drops, often the size of a hen's egg, deep 

 red, appearing black, sweet, very brittle. 



Gum kuteera, Gomme Bassora^ Gummi vermiculatum. In 

 l(X)se wrinkled drops, from the Sterculia urens, without smell or 

 taste, whitish, mostly transparent, forms a soft jelly in water ; but 

 if reduced to powder and boiled in water for a quarter of an hour, 

 it is entirely aissolved; a tea-spoonful of the powder gives three 

 ints of water the consistence of a syrup ; used as a varnish. 



GoM tragacanth, G. kuteera, Gummi tragacantlice^ Traga- 

 Titha, Astragali tragucuntJiOi gummi. Exuded from Astragalus 

 erus. From Aleppo, in cases; 3J of this renders water as thick 

 as would be done by 3J of gum Arabic ; demulcent, and from its 

 viscidity used in sheathing the fauces, and in allaying tickling 

 coughs: used also to dress ribands, laces, and in calico-printing. 

 Ojfirinal preparations. — Mucilago asirag. tragacanthte, E, D, 

 Pulv. tragac. comp., L, 



Gum agaty. From i^schinomene grand iflora. — Thoa gum. 

 From Thoa urens. 



Chim of Pitcaimia crystallina ; — Gum of Actinophgllum angu- 

 um ; — Gum of Artitioplu/lliim pedicellatnm. Scarcely known. — 

 um may also be obtained from many other plants. 



British gum. Made by heating starch to the temperature 



