NU T 
- Lapa to ae fraser Paralyfed limbs retain their 
rit a las dae lapfe of time, they become {maller. 
See Nerve 
des the modification 
affected. Exercife has 
the ant sid increafing the fize of the mufe 
es. . 
us deviations from the natural age occur tn 
Num 
this procels under difeafe. There may be ceffive de- 
pofition of healthy matter in any organ, pee Gonine {welling 
or exoftofis of the bones, tumours of various parts, &c.; or 
a morbid matter may be depofited inftead of the natural 
fubftance of a part, as in fcirrhus, foft cancer of the teftis, 
&c. aws, which ¢ egulate nutrition in the different 
organs and tiffues, ibe be confidered cai the refpetive 
ee on thofe fubj 
e bo ody this procefs does not take 
w additions made at one 
uM.) We believe 
in all the one tifa es. 
know about nutrition is fimply, 
that the various organic ftructures of the body form out of 
the blood, by virtue of their vital properties, mufcle, bone, 
&c. befides the different produéts 
has been afferted - fome pees chemitts, 
s are chemical; and fuch they mutt undoubtedly be 
held, if all the alterations in the component elements of 
nomena ordinarily called chemical. 
fucceeded in converting food into chyle, sie into blood; 
our organs: 
this fluid of its elements, tu con 
oO a 
bel Ser may be refolved 
ll 
changed into ain, mufcle, &c. 
this ea deftruGive aaicas ae ae the 
ueftion, but can hardly afford much affifta 
erhaps we are ae bar ly acquainted m4 ate extent of 
animal were fupplied with food, 
f 
words, can the exhalant arteries form phofphat of ime 
NUT 
from the blood, if it contains none? Some faéts have been 
afcertained, which bear analogically on this point; but 
there is no direCt proof either for or againft it. Dr. For- 
dyce found, that if the canary bird was not fupplied with 
lime, at the time of her laying, fhe frequently died from her 
eggs not coming forward properly. He divided a number 
of thefe birds, at the time of their laying eggs, into two 
parties: to the one he gave a piece of old mortar, which the 
little animals fwallowed greedily; they laid their eggs as 
ufual, and all of them lived; whereas many of the other 
party, which were fupplied with no lime, died. Vauquelin, 
on the contrary, obferved, that the oats confumed in a given 
time by a hen contained 136.509 grains of phofphat of 
lime, and 219.548 grains of filica. The fhells of the eggs, 
which fhe laid during this time, contained 98.776 grains of 
phofphat, and 453.417 of carbonat of lime. The excre- 
ments voided in the fame time contained 175.529 grains of 
phofphat, 58.494 grains of carbonat of lime, and 185.266 
grains of “filica, con eaey there were thrown out 
4.305 grains of ii of lime. 
nee gti carbonat 
185.266 filica. 
971.482 
356.057 
615.425 
We refer the reader to the article Grann, for our ob- 
fervations on fecretion; to which the procefs of nutrition 
bears very great analogy. 
NUTRITION of — 
CULATION, Pea iT 
NutRITION, in Pie, an obfolete term which was 
ufed to denote a kind of preparation, confifting in the 
gradual mixture of liquors of different natures, by ftirring 
them together till they have acquired a olen confiftence, as 
in making butter of Saturn, or unguentum n 
NUTRITI 
parts as affo and fup 
this refpe& there is confideable pee of different one of 
plants, as well as in the erent parts o ich they are 
Taken in 
Surplus 
See VEGETATION, Sap, Cir- 
conttituted. r. Darwin = ee that ie vege- 
bles, which approach nearelt to nature of anima 
bodies, are the moft likely to supply ce Piero Proportion 
of the nourifhing material. Hence the efculent mufhro 
s fuppofe ‘eaty pial and to oan “chief of 
fugar, sieaaar see t may be concluded that thofe 
which pee a largeit Seporien of fuch ma 
f fu 
And the fa 
