NUT 
to exprefs the cream of ea or bi pellicle which in fome 
cafes {wims upon the furface 
in Botany ~ Vi nny "Phy ology, Nux, a hard 
ing by valves, ufually confifting of 
imes sf more, each cell containing one, 
C 
Cob. 
Cocoa, the name of a ae nus of clas called by 
e alfo Cocos 
Not, Earth. See wee 
Nut, Faufel. See 
Nut, Filbert. See Fine BERT and CoryLus. 
Nut, Hazel. See Hazer oon CoryLus 
Nut, Malabar. See Just 
Nur, Peas, which = me call he lathyrus of botanical 
writers. See Latuyru 
Nut, Phyfic, a name omer given to the ricinoides of 
Pournelort. See Jarroeua and TURNSOLE. 
This is alfo a name ieee given to the aaa and 
fometimes to the croton. See Prvet Nuclei, 
Pig, a name by which the ‘pulbocallanum, or earth- 
nut is fometimes called. See 
Nut, Pi saa See Pistacu 
Nut, Spani/h, a name by which Cae call the Alyanckiam 
of botanical ae or the iris with a double bulb of Lin 
zeus. 
Nort, Vomic. See Nux Vomica. 
Nut, Wall, the name of a well-known genus of trees, 
called by Linnzus heat and by Tournefort fimply aux. 
See Jugnans and WaLNu 
Nut-Cracker, Nut- Pas, or Nut-jobber, in Ornithology. 
See Sitta Europea 
Nut-Cracker. See Corvus Caryocatades. 
Nut-Hatch, the Englifh name of a bird known among au- 
thors by that of fitta; and from its climbing trees in the 
manner of the _wood-pecker, called by fume, though impro- 
perly, picus cinereus, the grey wocd-pecker. (See SirTa 
Luropea.) This is alfo the name of other fpecies of Sitta s 
which fee. 
Nur-Jobber. See Sirta Europea 
Nurt-Oil/, is the oil of walnuts, prefied out of the kernels 
by means of a fcrew-prefs. This is ufed for the mixing 
with flake white or other pigments, Stee the clearnefs of 
the colour is of great ie aad and would be injured by 
the brown hue of linfeed 
Nuts of an Anchor, ina "Ship, are two little prominences, 
appearing like fhort fquare bars of iron, fixed acrofs the 
upper part of the anchor-fhank, to fecure the flock of it in 
its place ; for which purpofe there is a corre{ponding notch, 
or chanr rel, cut in the oppofite parts of the ftock, of the 
fame dimenfions with the nuts 
NUTATION, in Afronoms, a kind of pa dara or 
tremulous motion of the a s of the earth; whereby its in- 
a. 
nn 
QO 
+g 
g 
oO 
Cu. 
o 
< 
is difcovery in the year 
caufe “ this phenomenon in the Newtonian fyftem 
tractio 
The firlt principle of that fyftem is known to be, that 
all bodies mutually attra&t each other in the direét ratio 
of their maffes, and in the er ratio of the {quares of 
their diftances. From this mutual attraction, combined 
NUT 
he motion in a right line, Newton deduces the figure 
the orbits of the planets, and particularly that of the 
oan If this orbit was a circle, and if 
nor its body a 
{phere ; for the earth i is fenfibly protuberant towards the 
i has the fun in 
fo as to 
ae 
its inclination with the ai will be a little bean 
But though the irregularity is now accounted for, we are 
ft'l at a lofs for the caufe of its happening in a perio 
of nine years. This difficulty, however, will immediately 
difappear. 
The fame effe& which the fun produces upon the earth, 
by its attra@tion, 3 is alfo produc ed by the moon, which a&s 
with greater force, in proportion as it is more diftant from 
the equator ; now, at the time when its nodes concur with 
the equinoétial points, its greateft latitude is added to the 
greateft obliquity of the ecliptic. At this time, therefore, 
the power which caufes the irregularity in the pofition of the 
terreftrial axis, acts with the greateft force; and the revolu- 
tion of the nodes of the moon, being performed in eighteen 
years, it is clear, that in eighteen years the nodes will twice 
concur with the equinoétial points; and, confequently, ira 
twice in that period, or once every nine 
Bred and this balancin 8 he calls the nutation of - eid ala 
N° 485, 
p. 1. &c. anda fuller account of Dr. Bradley’ 8 dbiectns 
under the article STaRs. 
3 Nux ‘Mofthate, 
matic fruit, or ae the fruit oe the 
ft 
The female is ee chiefly ufed among us; its form is round 
or oval, of the 
Ah 
either tafte or {mell ; i fometimes put off, while yet in the 
fruit, for the female. YRISTICA. 
e nutmeg is adil in a covering, which is flefhy and 
Hh 2 tough ; 
