F O 
le&ted by the abforbent roots’ of Sra as they are 
more compounded bodies than the former kinds. 
iti 8 chyle of animals is 
the fap-juice, which is abforbe om the earth by the 
roots of plants, ponte their Beak ee and confifts 
of water, fugar, and mucilage, with other ‘tranfparent 
folutions, as eh ca wee b Bhoipaers and er cchaae ie 
But though it b 
oe that vegetables can extract or r eompofe all hele 
fubftances from alone, yet e materials 
contribute more G the roduétion of this Rares chyle 
or fap-juice than others, fuch he r rues of dead 
eee aa animal fubftances in gene 
The doétor therefore obferves, nat if any, ene fhould 
afk what is the food of animals? he fhould anfwer, thati in 
the moft early ftate of animal life the embryo lives on 
a edged saat with which it is furrounded, whether 
in : that in its” He ftate the young ani- 
mal i is a fotained ‘a milk, which i mach converts into 
1 ourifhment : 
Q 
ane that from the want of fuch a means of feparating 
faccharine matter, as foon as it is =“ chemilftry has 
not yet been om its elements with- 
out the ee bes srima a digetion, or hina germina- 
hydrogen, are alfo, it is fuppofed, diffolved’ 
uids’ by means of oxygen, and form a part of 
the chyle, caahont their being converted into gafes ; for, 
when this hap 
ob then 
5 em. 
It is afkked ba then is the food of vegetables? The 
mbryon plant, in: the feed or fruit is furrounded with 
fechsine aie ae aoe. and oily een like the animal 
foetus i inthe egg or uterus, whic it a oe ie converts 
into 
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a) 
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wm 
ww 
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aS 
bog 
a ginous juice,. pees for 
them at the time of their production, and depofited in the 
OD. 
roots or fap-wood of their parent- trees, asin the vine, mapley 
and birch ; which fac las matter is foluble and milcible 
with the water of the furroundin "e earth in the fubfequent 
ng, and is forcibly “abforbe 2d by their root-veifels, and 
a their nafcent foliage or leaves. 
_It is therefore concluded, that in their infantine ftate, 
mA ‘ 
ffe&t of animal digeftion in producing 
a appears in pene who labour ‘under diabetic affec- 
Tt i is now propertocome to the confideration of the food of 
adult plants ; and in this confifts the great and effential dif- 
ference between the nutritive procefles of animals and vege- 
Th 
tables mer are polleded. of a ftomach, by which 
they can, oe few hours, the canes parts of vege- . 
table and animal fubftances by a chemical procels within 
themes, cond dinthe heat of ninety -cight de egrees, 
wit of water, anda etual agitation of 
the Pectin neu both mixes fen fa applies them to 
the mouths of the abforbent veffels which furround them. 
Whereas a vegetable being, having no {tomach, is neceffitat- 
aire to wait for the i aaah decompo ofition o animal or 
ae 
Siberia,) and often without an adapted quantity of water to 
givea due fluidity, or any mechanical egess to prefent 
them to the abforbent mouths of their roots: or in ftill 
worfe fituations, adult vereles are neal ftill mere 
aaa y to acquire or pruduce their nutritive juices from the 
with perhaps the folu-« 
Sona of carbonic acid and - Sia ik and perhaps of 
e other meres ig ee one or more of them abound, 
or are faturated. R, WATER, Cisse Acid Gass 
and CALCAREOU Rartl . 
t owever remarked, that M. ee found 
is 
that the vegetation of thofe ane was imperfect wh 
not been fuffered to grow in conta& with the pei 
they never arrived at fuch maturity as to produce fruit, ad 
were found, on analyfis, to contain alefs portion of carbon 
than other plants of the fame kind, The experiments were 
e the 
thefe two extenfive kingdoms the larger 
and warmer bloode seals cs certainly, and it 1s fuppoled 
all the tribes of infeéts, and of colder-blooded shone ee 
alfo, cannot exift long on air and water alone, except 
flate of hibernal torpor. ne neareft approach to this 18, 
however, it is thought, feen in fome fevers, where water 
it is co 
air kee with the carbonic acid, and perhaps other invifible 
. fulvents 
