87 
1. Green colouration produced by ferric salt. 
a Ee tated sulphuric acid makes a pink-brown colouration. 
eagents give Saereere without much precipitating. 
Baloghia lucida, 
6. Concentrated su i hui acid makes a fox-red precipitate. 
All peas make coloured precipitates. Bombax mala- 
baricum, D.C. 
2. Blue ein roduced by ferric coe Gums containing a 
phlobaphene coloured pink by alkalie 
a. Gum solution yellow brown with a eenTE blue fluorescence. 
Uranium acetate gives a light-brown precipitate. Calo- 
phyllum tomentosum, Wight. 
6. Gum solution pink- brown, without Pnoneacnnre: Uranium 
acetate gives a dark-brown precipita 
aa, Bther takes a small amount of a “ es resin out of 
the gum solution, which dissolves in caustic potash with 
a yellow colouration 
1, Potassium eyani ide ‘Snyns the phlobaphene of the gum 
he pon n to a beautiful pink. Lonchocarpus Blackit, 
nt 
2. Potassium cyanide stains the phlobaphene i in the gum 
nen more brown than pink. Millettia megasperma, 
bb. Ether died not take out any resinous matter. 
EvcaLyrtvs. 
1. enprit gums containing’ between 30 and 40 per cent. 
arabin and not over 40 per cent. of tannin. Gums 
inieoluble.; in alcohol if not mlaed in water first; 
soluble in water if not too old: —Eucalyptus retinifere, 
Sm.; E. siderophloia, Benth. 2. robusta, Sm,; £ 
erebra, F. vy. M.; E. saligna, Sm. 
- 2. Euealypt gums containing not over 6 perce 
or sty in and sometimes less, by 60 to 70 percent 
of Gums entirely soluble in alcohol and 
totally soluble in water: :—Eucalyptus acmenioides, 
Schau.; E. eugenioides, Sisbs bo R._piperite, Sm.; #. 
Planchontana, os v. M,; , Sm; FZ. 
BB Pilularis, Sm.; E. po SS 
: Guus NOT Asrrrveenr, —Ferrie acetate does not stain. 
eee soluble in water, containing only rings a 
gum solution opalescent, iving up the o 
body kg Grovillese teat ) to ie Ferric chloride (and 
« Wat. sear asitiéai sai ap oe ‘tik pblatinising 
ate 
gum solution even in a ne = 
tick but ot gelatinising with 
oe ly with ferric pr: 
even in a thick sta’ 
