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Sect. XIi.] 



BOTANY. 



407 



/ 



Dye-stuffs 



8. 3Iedicinal substances. These are of vast iinportance. 

 and merit the atterition of travellers in eyery country. 

 With respect to many, H is not yet known, except to the 

 natiyes who collect and prepare them, what are the par- 

 ticular plants that yield them. It is hoped the present 

 application may be the means of dispelling this ignorance 

 among scientific Europeans ; and that travellers will en- 

 deavour to procure the substances and well-dried flowerino- 



.1 



specimens of the plants from which they are obtained. 



9. General products of vegetables. It is extremely 

 difficultj perhaps impossible, to enumerate all of tLese 

 which a museum ought to contain, but the enlightened 



traveller will form a tolerably correct judgment. Such 

 as are useful to mankind cannot fail to be interesting. It 

 were of course idle to exhibit every well-known object of 

 this description, tea^ sugar ^ ^(ffee^ cocoa^ chocolate >, paper ^ 

 clothing^ &c. ; but there are states even of these familiar 

 substances which would prove both useful and instructive. 

 The cane yielding sugar^ for instance, is advantageously 



exhibited, Paper^ again, is made from an infinite variety 

 of vegetable substances ; and the different sort^s are well 

 worth collecting, from that afforded by the papynis of the 

 ancients (which gives the name) to what is manufactured 

 of the inner bark of an East Indian Daphne (or Spurge- 

 laurel\ and another from the pith of an unknown plant 

 in China (the so-called rice-paper\ or the leaves of a 

 Palm in India, or straw in North Amex^ica. Of all such, 

 the several stages of preparation should be collected, not 

 only as objects of .curiosity, but because they exemplify 

 the progress of art and science. 



