90 
Bdellium is another Indian product described by Dios- 
corides, who gives madelcon and bolchon as other names. 
This the Persian authors describe under mokl, giving 
bndleeon and madikon as its Greek, and googul as its 
Hindee synonymes, stating it to be produced by the 
Doom Palm (Cucifera thebaica). The googul obtained in 
N. India I was told was the product of a tree, which, 
from its birch-like bark and other characters, I knew 
to be the Amyris (now Balsamodendron) Agallocha of 
Dr. Roxburgh ; which he, almost at the other extremity 
of India, had also been informed was called googula. 
This he describes to be a native of the districts of Silhet 
and Assam, diffusing, when bruised, a grateful fragrance, 
like that of the finest myrrh. This googul must be a 
very different substance from the gogul described as a 
species of Bitumen, used at Bombay, Bengal, &c, for 
painting the bottoms of ships (Milb. Or. Com. p. 102). 
The African Bdellium, probably the mokl-al-mukkee, 
Bdellium mechium of Avicenna, is produced by Heudelotia 
africana (Arch, de Bot. 1. p. 421), another of the Terebin- 
thacece ; Avicenna describes one of the kinds, as mokl-al- 
yahoodee, or Bdellium judaicum. 
Olibanum, from *i@avos (Arab, looban), the thus of the 
ancients, is another fragrant resin, of which both an Ara- 
bian and an Indian variety are described : two kinds 
continue to be known in modern as in ancient commerce. 
The tree producing the first kind has not yet been ascer- 
tained, but it may be a native both of Africa and Arabia 
(v. Spr. in Diosc. 11. p. 376). The Indian kind, which is 
called koondur, and under which name Olibanum is 
described by the Arabs, has been shewn by Mr. Colebrooke 
to be the produce of Boswellia serrata v. thurifera. I 
have taken some off the tree, which closely, though not 
exactly, resembles that of commerce, burning with a 
