[ 8 72 ] 
ference in the form of the leaf, it might be well 
worth the attention of the Eaft India company to try 
to cultivate thefe plants in the manner they do in 
Ceylon ; that is, to make plantations in a proper 
foil ; and to have regard to the proper diffance from 
the fea of the place, where they try the experiment : 
for fome plants require to be near the fea, and others 
far from it, in Sumatra ; which is the eafe of the 
Mango, and Mangoffeen ; the one of which muff 
be near the fta, the other at a diftance from it. 
I think the plants fhould be buffered to grow 
ffrong, to be fix or feven years old, and then cut 
every three years, the bark peel’d off' and dried in 
hot land, and packed clofe, and kept dry. This I 
take to be all neceffary to be done, to try, if our 
Cinnamon will not produce as good a price as that 
of the Dutch. 
Perhaps the plants need not ftand fo long before 
cut ; for the vegetation of plants in hot countries is 
very great. 
Th ere are many other moff valuable vegetables in 
Sumatra, which might be made ftaple commodities, as 
fagoe, camphire, feveral forts of ginger, rice, and many 
other, which are foreign to the prefent inquiry.. 
Put it may not be amifs to recommend it to the 
traders to Sumatra to bring fome quantity of the 
twig-bark of the true Cafiia, well cured j and all'o 
to the company, to have a .chemift at Sumatra, to 
extradt carefully the oil of Cafiia; which is beff, and 
in greateft quantities, produced from the bark of the 
body, and of the larger branches of the tree : and 
alfo that the company would procure an exemption 
of .all cuftoms or duties on Cafiia, or on the oil of 
Cafiia, for fome time.: and alfo that the college of 
S phyficians 
