MELIACEAE. ~~ 389 
= corky lenticels ; it is very loosely attached, and when removed 
leaves a nearly smooth pale red surface. The tree also affords 
a soluble exudation allied to gum arabic, which occurs in amber- 
eoloured tears, more or less cracked.. It swells in water to a 
whitish and transparent jelly ; with more water it becomes 
liquid enough to pass through a paper filter. The solution has 
 aslight acid reaction, it is coagulated without colour by ferric 
_ salts, and is not precipitated by neutral plumbic acetate. The 
gum affords a calcareous ash améunting to 4°16 per cent. 
The wood of this tree is the Satinwood of India; it is oily, 
and turns well, making nice stethescopes, &e. 
erie ns G5. 3s hee oe et 
Cedrela Toona, Road. Cor. Pl. iii., t. 238; Bedd, Fl. 
Sylv. t. 10. Tun ( Hind.), Tuni (Mar.), Nandurike (Can.), Tunu- 
maram (Tam.), and in Sanskrit Tunna and Nandivriksha, has a 
"* very astringent bark, which is used by native physicians in com- 
bination with Bonduc nuts as a tonic and antiperiodic. The- 
flowers (Gul-tun), which are small, yellow, and sweet-scented, 
contain a yellow’ dye, and are considered to be emmenagogue. 
Nees von Essenbeck has published an accotint of some experi- 
ments made with the bark which indicate the presence in it 
of a resinous astringent: matter, a brown astringent gum, and. 
_ @ gummy brown: extractive matter, resembling ulmine. We 
od 
- * 
_ find that the gum of this tree first swells, and then dissolves 
in water ; the solution is unaffected by neutral plumbic acetate 
and ferric chloride, and is dptically dextrogyrate. The gum 
_ leaves when burnt 4°68 per cent. of ash, consisting mainly of 
_ calcium carbonate. The wood resembles mahogany. 
Chickrassia tabularis, Adr. Juss. Wight Ill. 1., t. 56; 
‘-Bedd. Fl. Sylv. t. 9, a tree of Eastern Bengal and of the West- — 
ern Peninsula from the Concan to Travancore, has an astringent ’ 
bark, without any bitterness, w which is sometimes used asa 
cabinet makers and coopers. The generic name of the tree is 
“derived from the Bengali name Chikrasst ; it is 
febrifuge. The wood, which is close-grained and light-coloured, fc 
is known as Chittagong wood, or White Cedar, and is used by 
called in Tamil 
gee 
