

<h! 



I 



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^■'fe 



.^^7 7 ^ 



^/« 



'^-.,/ 



^^^ >i 



-\ 



J. J 



cfife 



^^^ ben 





n yet fully 



jde all 



CO 



lis of thefe 



ilckliiver is 



mentioned 



than their 

 )duce, fome 



1 



more ng 



laid, 



n our 



difco 



le 



» 



\^ 



glands of 

 -hich be- 



isniu 



cilage, 



J 



r 



aro 



materi^!^ 

 3f the arug' 



re 



tions 



ftbe 



5 



? 





\V 



; 



Sect. VI. 2. i. 3. i. 



SECRETIONS. 



73 



§. 



believed to be performed by the mouth of each gland being irritated 

 into aaion by the ftimulus of the blood, which is brought to it, and 

 that by a kind of appetite it drinks up 



part of the blood 



lefs folid 

 II. I. 



the fluid, which it fecretes, which then becomes more or 

 as its aqueous parts are abforbed or exhaled. 

 Mucilao-e is found in all parts of plants, as being an efiential 



ftltuent of vegetable as of animal bod 



fo when 



extradl is 



made by boiling plants in water, the mucilage makes the greateft part 

 of this'extraa. The mucilage called gum arable is obtained from 

 mlmofa nilotica, gum tragacanth exfudes from aftragalus tragacantha, 

 - - fimilar gum exfudes from our cherry and plumb-trees; fagoe is 



root of the orchis 



£> 



the pith of the ly 

 dried in an oven. 



This muc 



and falep is the 



feems to ferve as nourishment to the pi 



firfl: 



becaufe it is found in all vegetable as well as animal materials, as they 



decompofe 



duns 



h 



fecondly, becaufe 



for 





ds the Gfrowth 



of vegetables, when fpread upon land ;. thirdly, becaufe 

 which bleed much gum, are weakened and frequently dl 

 becaufe it is evidently laid up in the roots and feeds of 



& 



t h 0-1 



d laftly 



tables for the nourifliment of the youno- 



o 



B 



in 



thefe 



feems to undergo a change either in part chemical, or wholly by 



iliseft 



o 



a 



of the embryon pi 



and is converted into fu 



o 



/■ 



the tranfmutation of barley 



d as appears from th 



fweettaftc of onions and potatoes, when boiled after they have ger- 

 minated; and as fugar abounds in the vei'nal fap-juice of trees hi 



fuch quantity as to be capable of fermentation 



III 



St 



IS 



ther kind of 



to 



W 



h dlffi 



from 



/ 



thofe above mentioned in its property of not diffolving in cold water, 

 and can hence be eafily feparated from them. 



<yood raw potatoes be grated by means of a bread-grater into 



If eight pounds of 



cold 



water ; and, after well agitating the m 



the flarch be fuSercd 



fublide; and this flarch be then mixed with eight other pounds of 



/ 



JL 



boiled 



