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Sect XII.] 



BC)T4.N1. 



419 



By this list of Inquircnda it will be seen that they prin- 

 cipally refer to the productions of warm and dry climates, 

 where indeed the most valuable vegetable substances are 

 foimd. Temperate regions, however, afford ample scope 

 for the researches of an intelligent naturalist. In every 

 country, too, certain localities offer peculiar facilities for 

 tracing the articles of commerce to their soin^ces= Such 

 are the capitals and principal sea-ports : Rio Janeiro, for 

 example, for the products of Brazil ; Senegambia for the 

 interior of North- Western Africa : and Smyrna for Asia 

 Minor. The rich products of Eastern India find their 

 way to Ein-ope by various channels, especially Calcutta 

 and Ceylon ; those of North- Western India, some by tlie 

 Levant or Trieste, .but much the greater quantity by 

 Aden, Mocha, and, above all. 



M 



The latter 



places are also frequently the outlets for the productions 

 of Persia, Arabia, iVbyssinia, and the east coast of Africa. 

 Again, at Kurrachee, and probably better at Hyderabad, 

 Dr. Boyle states that a detailed list of the articles brought 

 down that river, and which are highly important to he 

 ascertained, may probably be had. Travellers, who visit 

 the localities where any interesting vegetable substances 

 abound, will confer a great service upon science by pro- 

 curing not only these articles, but the identical plants 

 from which they see them collected. And it is 



to do this, even in the case of common and well-known 

 productions, for many of them need to be verified, and 



to have the opinion of preceding observers confirmed. It 



^^ 



is only by this means that we shall become acquainted 



Afi 



Oak 



or TeaL and with the 



various 



kinds of Cinchonas or Medicinal Barks of Peru. Of 



