NOD 
in contradiftinction to diutnal. In this fenfe we fay, no@ur- 
nal “ik cneae 3; nocturnal walks; no¢turnal pollutions, &c. 
Noc L Pains are a frequent concomitant of venereal 
diforders, uch an only be palliated with narcotics ; 
nothing but a mercurial cour, or a long-continued ufe of 
diet-drinks, can entirely remove them. 
Nocturna Arch, in alka ie arch of a circle de- 
{cribed by the ie ora ftar, int 
part of our meridian. 
CT Noéurlabium, is more particularly ufed 
for an irae, che ufed at fea, to take the altitude 
or depreffion of fome of the ftars about the pole, in order 
to zo = latitude, a the hour of the night. 
e nocturnals of various contrivances, fome of 
them eas of the {phere ; fuch as the hemifpheres, or 
ree on the plane of ‘the equinoGtial: thofe ordi- 
aly y the feamen are two; the one adapted to the 
polar i and the firft of the guards of the Little Bear ; 
the other to the pole-ftar, and the pointers of the Great 
ear 
No OCTURNAL, Conffruétion of the. The inftrument confifts 
of two pial plates lor I. mie seed Jig: 10.) applied 
ch ot Th ater lds a handle to h old 
on ea 
If the inftrument be fitted for two ftars, the handle is 
made moveable. The upper left circle is divided into 
twenty-four equal parts, for the twenty-four hours of the 
day, and each hour fubdivided into quarters, as in the figure. 
Pal twenty-four hours are noted by twenty-four teeth ; 
told in the night. Thofe at the hours twelve are 
In the centre of the two cir- 
comin ben the conte. you fee the brig far or guard of 
the Little Bear (if the inftrument be fitted to that ftar) ; 
then that tooth of the upper seen under the edge of the 
index, is at the hour of the night, ‘on the edge of the hour- 
circle; which may be known without a light, md accounting 
the teeth from the longeft, which is for the 
Nocturna Crimes, Pain of. See Howie ce, 
NocturnaL Pollution. See PotiuTion. 
OCUM, in Geography, a town of le ia in the 
cirear of Sirhind; 20 mies NE. of bm nafar 
NOCUMENTI Assisa. See Ass 
NODAN, in Geography, a town of Prafia a, in the pro- 
ye of Samland, on ie coaft of the Baltic; 14 miles N. 
of Pillan 
NODAR, or Se rat a Pia of Portugal, in Alen. 
tejo; 21 miles 3.E. of Mou 
NOD 
NODATED Hypersora, a kind of hyperbola, which, 
elf. 
in turning round, decuffates or croffes it 
LE’S Isianp, in Geography, sina pleafant, a“ 
fertile ifland in Bofton harbour, Maffachufetts, about tw 
miles E.N.E. of i town ; occupied as a farm, and valine 
large quantities o 
NODDY, in cy. See Sterna Fuliginofa. 
NODE denotes, in Surgery, a {welling of the peri- 
ofteum, tendons, or bones, from a venereal caufe. The 
progrefs of the difeafe in this form is extremely flow, and 
attended with little pain. In fome cates, — the pain 
is confiderable, ee angele in the night tim Nodes con- 
tinue a long time before matter is formed, and when fuppu- 
ration does oe. place, - It is of a very imperfe&t kird. 
Sudden segue of the periofteum, without noturnal 
pains, are not v 
The bones ides are = peculiarly hble to nodes, are fuch 
as are fuperficial; for inftance, the front furface of the 
tibia, the bones of the cranium, the triangular part of the 
ulna below the olecranon, &c. 
The treatment of nodes is confidered in the article Luss 
nered. 
NODERMALM, in Geography, an ifland of Shi tei 
on which ftands a part of the city of Stockholm. On ita 
a palace and opera-houfe, an ancient arfenal now concerned 
into a theatre, three churches, an obfervatory, &c. 
» in Affronomy, the two points wherein the orbit 
of a planet interfects the — om 
uch are the two points C and D (Plate XVII. Afron 
Jig» 7.) of which the node C, where the planet afcends nor rth- 
wards above the plane of the ecliptic, is called the a/cending 
node, the northward node, and the head of the dragon ; and 
is thus marked, 9. 
The other node D, where the planet defcends to the fouth, 
is called the de sfeending node, the eb node, sor the 
lad s tail; thus marked, 99. See Dragon's head and 
t line D . wherein the two circles interfe&ty is 
cle py ie of the nodes. 
appears from obfervation, that the line of the nodes i 
all the planets conftantly changes its place, and fhifts its. 
fituation in antecedentia ; i.e. from ealt to weft, contrary . 
the ital of the figns. 
s, by a retrograde motion, the line of the moon’s 
nodes, moving at the rate of about 195° in a year, finifhes 
it circuit in five days ; 
n which ti ime, after having receded from any point of the 
, that this motion 
great fill, all the elements and varieties in this motion, from 
its caufe 
In order to underftand the a&ion of the fun in this cafe, 
we mutt conceive the plane of the moon’s motion to pafs al- 
ways through - centre of the earth and the centre of the 
pti and to be a plane in which-the sep line j aad ets 
em 
pete on, or the tangent o 
is certain, that if the earth and moon were a 
equally by the fun, they would ren sally towards the 
fun ; the plane determined always by thefe two lines, would 
defcend with them, keeping always parallel to itfelf, fo that 
the moon wou'd appear to us to revolve in the fame plane 
conftantly, with refpeé& to the earth. But the inequalities 
in the aétion of the fun (fee Moon) will bring the mcon out 
of this plane to that fide of the plane on which the fun is, in. 
the half of her orbit that is neareft the fun, and a the 
other 
