136 
ON COD LIVER OIL. 
and from the colour of the wood, some of the natives dis- 
tinguish the species ff red Pa-douk," being P. Dalbergioides, 
and " white Pa-douk," P. Indicus. 
Both these trees produce an astringent gum, which has 
been exported for gum kino ; or whether it was a mixture 
of both it is not possible to say. Probably the latter, as 
the native collectors would not probably make any dis- 
tinction. Possibly it is the production of neither. It may 
be that P. marsupium is found in the Shan States, for it 
grows, I believe, in Assam ; and the man that did not dis- 
tinguish the two species in Maulmain, would not distinguish 
them from a third at Zimmay. Be that as it may, this is 
certain, that these provinces can furnish the commercial 
world with a large quantity of gum kino. If the result of 
the experiment which was made be correct, we have a 
great abundance of it within our own borders; for the 
Pa-douk is one of the most common forest trees in the pro- 
vinces from the Tenasserim to the Salwan. It furnishes a 
considerable portion of the fuel that is sold in Maulmain. 
But if not, it is certainly abundant in the neighbouring 
provinces, whose only avenue to market is through our 
territories. — Chem. Gaz.,from Journal of the Asiatic Society 
of Bengal. 
ART. XXXI.— ON COD-LIVER OIL. 
By Jonathan Pereira, M. D. ; F. R. S. 
The great and daily increasing consumption of cod-liver 
oil renders all inquiries relating to this therapeutical agent 
interesting alike to the Physician and the Pharmaceutist. 
I think, therefore, that some account of the present state of 
our knowledge, with respect to the chemical nature of this 
oil, may not be unacceptable to the readers of the Pharma- 
