134 The Vegetation Book IE. 7 
14 $. AND that the Milky Liquors of all Vegetables wharföcver, 
are more Oylie than their Lympha’'s, is moft certain. For all tho Gums, 
which diffolve either in Oy! or in Water, as Galbanum, and the like, 
ate 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 Tafte, Bitter, Aftringent, Hot, Cold, or any other whatfoever 5 
and having well dyed 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 Gum, and the diftinGtion there- 
of both from a Rofix anda Mucilage. Firlt, a Rofin, is originally a 
Turpentine, or Acidoleous Liquor, having an exceeding fmall quantity 
of Watery Parts mixed therewith 3 and which, for that reafon, will 
not be diffolved in Water, but only in Oy! Ofthis.kind are Maflick , 
Benzoine, Taccamahacca, and divers others, commonly, in our Bils to A- 
pothecaries, called Gums. Yet in ftriét fpeaking they are all fo many 
Rofins. 
A $. 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 diflolve ei- 
ther in Water or Oyl. Of this kind are sagapen,Opopanax, Ammoniac, 
and others, 
17. $. The third fort of Gum, is that which is Usoylie, 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 Mucilaginons Lympha iffuing from the Veffels of the Tree. 
In like manner, as it doth from Cumfry, Mallow, and divers other 
Plants: and even from the Cucumer. The Vefféls whereof, upon cut- 
ting croß, yield a Lympha, which is plainly Mucilaginous, and which 
being well dryed, “at length becomes a kind of Gum, or rather a 
hardened Mucilage. In like manner, the Gums of Pluprtree, Cherry- 
tree and the like, are nothing elfe but dryed Mucilages. Or, if we will 
take the word inits wideft fenfe, then all Gums are originally, either 
a Terebinth, or a Milk, or a Mucilage. 
18. $. I have likewife made divers Obfervations of the Tafts, 
Smells, and Colours of Plants, and of their Contents, fince thofe I laft 
publifhed: and that both for the finding out the true Canfès of their 
Generation, and alfo the applying of them unto Medical and other 
Ufès. Of which hereafter. 
CHAR 
