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The Vegetation Book 1, 
14. § AND that the Milky Liquors of all Vegetables whatfoever, 
are more Oylie than their Lywapha’s, is moft certain. For all thof Gums, 
which diffolve either in Oyl or in Water, as Galbanum, and the like, 
are originally the Milky ‘fuyces of Plants. And if you take the Milk 
of any Plant, as for inftance, the Milk of common Sumach, or of 
any afte, Bitter, Aftringent, Hot, Cold, or any other whatfoever 5 
and having well dryed it, and then fired it at a candle 5 it will there- 
upon burn with a very bright and durable flame, even like that of 
Tar or Turpentine it felf. 
15. §. FROM what hath been faid, we may likewife gather 
the moft genuine import of the word Gua, and the diftinétion there- 
of both from a Rofiz anda Mucilage. Firlt, a Roffv, is originally a 
Turpentine, or Aczdoleons Liquor, having an exceeding {mall quantity 
of Watery Parts mixed therewith 5 and which, for that reafon, will 
not be diffolved in Water, but only in Oy, Of this kind are Maffick , 
Benzoine, Taccamahacca, and divers others, commonly, in our Bils to A- 
pothecaries, called Gums. Yet in ftriét {peaking they are all fo many . 
Rofins. 
He g. Secondly, a Gum, and every Oylie Gum, is originally a 
Milky Liquor, having ‘a greater quantity of Water mixed with its 
Oyly Parts; and which forthat reafon, will be made to diffolve ei- 
ther in Water or Oyl. Of thiskind are Sagapen, Opopanax, Ammoniac, 
and others, : 
17. §. Thethird fort of Gum, is that which is Uvoylie, and which 
therefore diffolveth only in Water, as Gum-arabich , the Gum of 
Cherry-Tree, and others fuch like. This Gum, though commonly fo 
called, yet is properly but a dryed Mucilage: being originally nothing 
elfebut the Mucélaginous Lympha ifluing from the Veffels of the Trec.’ 
In like manner, as it doth from Cumfry, Mallow, and divers other 
Plants: and even from the Cuewmer. ‘The Vefféls whereof, upon cut- 
ting crofs, yield a Lympha, which is plainly Mucilaginons, and which 
being well dryed, at length becomes a kind of Gum, or rather a 
hardened Mucilage. In like manner, the Gums of Plum-tree, Cherry- 
tree and the like, are nothing elfe but dryed Mucilages. Or, if we will 
take the word inits wideft fenfe, then all Gus are originally, either 
a Terebiwth, or a Milk, or a Mucilage. 
18. §. I have likewife made divers Obfervations of the Tu/#s, 
Smells, and Colours of Plants, and of their Contents, fince thofe I lat 
publifhed: and that both for the finding out the true Czu/és of their 
Generation, and alfo the applying of them unto Medical and other 
Ofes. Of which hereafter. 

CH AP. 

