Of the Vegetation Book IL 
fome Spirit and Aer, But divers Umbelliferous Roots, efpecially which 
abound with Lailiferons Vefels, are kot5 as Fenil, Lovage, Angelica, 
&c. Yetisit not their Oyl alone that makes them %ot, but the com- 
bination thereof with the Salime Parts: as is manifeft, from the nas 
ture of the Seed of thefe Plants; wherein, as the Oyl is molt copi- 
ous; So being held to a Candle till they burn , conftantly (pit 5 
which cometh to pafs, by the eruption of the saline Parts: and 
is the very fame effect, with that which followeth upon burning of 
Serum or Blood. And therefore, as thefe Seeds are more kot, the 
alfo fpit the more; So thofe of Cumine, which, though fulfom, yet 
are not fo hot, fpit les; Fenil and Dil, which are hotter, more ; 
there being a greater quantity of volatile Salt contained herein. 
Hence all Efential Oyls are hot, the Spirit and volatile salt, being in- 
corporated herewith. And fome of them will foot, and cryftallize as 
Salts do, as that of Anife 5 which argues a mixture of a confiderable 
quantity of volatile Salt. As alfo doth the Nature of thefe Oyls, in 
being amicable to the Stomach, Carminative, and fometimes Anodyne 5 
fail. as they kill fome fetid, or corrofive Acid : for volatile Salts them- 
felves will have the like operation in fome cafes as thefe Oyls. 
69. $. Many Ladfiferons Roots, as Taraxacum and others of that 
kind, are not fo much bot, as bitter. For although by the Ladife- 
rows Ve/fels they are very Oyly; yet thofe Veffils being polited in Rings, 
and not in Rays, and having_no Diametral Portions running through 
their Barque tothe Acr-Veffels 5 the Acido-Aerial Parts do hereby, al- 
though not mortifie, yet fo far refra the faline, lightly binding up 
the Oleous therewith, as to produce a bitter Tafte. So, many fweet 
Bodies, upon burning, become bitter; the Acid Parts, now becoming 
rampant, and more copioufly mixed with the-Oleous. 
70. The Roots, orother Parts, of many Umbeliferons Plants, have 
a fivcctifh Tafte, as both the Sweet, and Common Chervil; both the 
Garden, and wild Carrot ; Parjnep, Fenil, &c. the Saline Principles 
being concentred in the Oyly, and both of a moderate quantity with 
refpect tothereft. For by the Oyly, the Saline is rendred more fmooth 
and amicable ; and both being moderate, they are not therefore hot, 
as in fome other Umbelliferous Roots; but by the predominion of the 
other Principles, made mild. Hence it is, that Sugar it felf is fiveet, 
Jeil, becaufe it is an Oleous Salts, as is manifelt, from its being highly 
inflammable 5 itseafie diffolution by a moderate, Fire, without the ad- 
dition of Water; and in that, being melted with Turpentine, and 
other Oily Bodies, it will six together with them. So alfo the Acid 
Parts of Vinegar, being concentred in the Salino-fulpbureous of Lead, 
produce a sugar. Hence Barley, which upon Difillation or Decottion 
yeildeth only an acid 5 being turned into Manlt, becomes fireet. Be= 
caufe,being fleeped, couched, and fo fermented,the oleous parts are thereby: 
unlocked, and becoming rampant, over the other Principles, altogether 
produce that Tafte. And the Bile it felf, which, next to Water and Earth, 
contifteth moft of oily parts, and of many both faline and acid isa bit- 
ter-fiveet. Wherein, as fome of the Saline and Acid parts, (moothed by 
the Oleous, produce a Sweet: So, fome of the Oleons, impregnated with 
the Saline, and the Acid, doe hereby produce a Bitter. 
