( 124 )


Which, befig *educed to the fame denominafion, as here
follows
73-.96 -4300 - 3IO0+(710- 500)Y        o
-0.-04 + 11. O 0510
-1 .20y   O.04
-y =o004:21.0=0.0032
Therefore it= 8 .6000 + 0.0032 - 8.6032
Suppofe x = 8- 6o,z +y ; Then will
X'-74015050%24+ 17 . 2o640000
y +y2
-5k - - 43 . oI6coCCo - 5000oooo0
3-~I~3I =.Oooocoo
- o.o000g4976I 12. zo64o~ooty -o
.y-ok.00oc94976: 12 .20o640000
0 o. 00G0077808.
Therefore  -8 .60;20cOOOO + 0 .0000077808=
8.603i7 7808.
Suppofe, again, the Root of a Cubic Equation xa +± zxs
-    x-70 =7   be required by Approximation; here let
the Root be 5 + y, fince the Terms are omitted wherein
y' and yI are found; there is no neceffity for expreffing
'em in the Transformation df the Equation.  Wherefore,
we fmid
XI- 125 + 75Y'.-
+ 2X     50±    Y.-.
W    -v II15 - 23 3
70   -   70
- I0+72y      0
.Y          0
Thereforex    5 + 0. l =  5 .1
Suppofe x    5. I +My: Then will
x =   32 .65 1 + 78 .0 303 ....
+2X' a52 .020 + 20. 400Y
-23 x       I117 . 300 -  23-.00OY
- 70=-    70. Coo
_    z.629 + 75 .43CyY 0
75 .430Y3'2 .629
y-3.649: 75.430=0.0348
Wherefore X    5 . I + 0.048 = 5. 1348.
And after the fame manner might one proceed to Injfi-
Pity.
APPUI, in the Manage, q. d. rejt or fla. upo0n the Rand;
is the reciprocal Effort between the Horfe's Mouth and the
Bridle-Hand * or the Senfe of the Adtion of the Bridle in
the Hand of the Horfeman. See HEAD, BRIDLE, SC.
A juft A1pui of the Band, is the nice bearing up or flay
of the Bridle; Co that the Horfe being awed by the Senfi-
bility and Tendernefs of his Mouth, dares not reff too
much upon the Bit-Mouth, nor check or beat upon the
Hand to withlfland it.
A dull, obtzlfe ApTui, is when a Horfe has a good Mouth,
but his Tongue Co thick, that the Bit cannot work, or bear
upon the Bars; the Tongue not being fo fenfible as'the
Bars: tho' the like Effea is Sometimes owing to the groff-
nefs of his Lips   A Horfe is faid to have no A1p7.1i,
when he dreads the Bit-mouth; is too apprehenfive ot the
Hand, and can't bear the Bit.-He is- faid to have too
much   Iptui, when he refis or throws himfelf too much,
too hardily upon the Bit.-Horfes defigned for the Ar-
my ought to have a full A5ppUi upon the Hand.
APPULSE, in Affronomy, the approach of any Planet
to a Conjunaion with the Sun, or a Star. See CONJUNc-
TION .
APPURTENANCES, or APPERTINENCES, inCom-
mon Law, fignify things both corporeal, i. e. belonging to
another thing, as their principal; E. gr. Hamlets, to a
chief Manor, and the like: and incorporeal, as Liberties
and Servicesof Tenants, Cec. SeeAPPENDANT.
The Word is form'd of the Latin, ad, to, and pertinere,
to belong.
APRIL, the fourth Month of the Year, according to the
common Computation, but the fecond according to that of
/ the Aftronomers. See MONT II.
In this Month the Sun travels thro' the Sign I7aurus. See
SUN and TAuRus.
The Word is derived from the Latin aperilis, of aperio,
I open; becaure the Earth, in this Month, begins to o-
pen her Bofom for the Producfion of Vegetables. See
bPRING.
APRON, in Gunnery, a piece of Lead which caps, or
covers the Vent, or Touch-Hole of a great Gun. See GUN,
ORDNANCE, ZOC.
APSIDES, AsInDES, or APstDz, in Affronomy, two
Points in the Orbit of a Planet, the highefi whereof is cal-


A QU


led the APhelion, or Apogee 5 and the lowefi the ,
or Perigee. See APIELION, APOGEE, PERIuE
PERItGEE.II
The Apfdes are alfo called Aiges. See Auo
The Diameter which joins thefe two Points is
Line of the ApfZks, and pafres thro' the Center
bit of the Planet, and the Center of the Eartb
is the Line AP, (Tab. AsTRONoMY, fig. i.) di
the Aphelion A to the Perihelion P. See 0
PLANET.
The Eccentricity is reckoned in the Line of the
being the Diflance between the Center of the Or
Planet C, and the Center of the.Sun or Earth S,
as the Copernican or the Prolemaic Syfiem is
See ECCENTRICITY.
For the Motion of the Line of the Apfdes,
GEE, CC.
The Word comes from the Greek e&4g, an
Vault.
APsIDEs were alfo antiently ufed for a kind
Oratories, or Chapels in great Churches; others


ODoxologia, or5Voxalia. see(UssTORY.
They were thus call'd, becaufe arched or vaulted over.
The Word Rill obtains in the Low Countries, where it
denotes a kind of Choir, or Place beyond the Altar; where
the Religious fit, and fing the Office, feparate from the
People, and without being feen by 'em.
AP-THANES, an ancient Term fbr the higherNo-
bility in Scotland. See TnANE.
AZTITUDE, the natural Difpofition any thing hath to
ferve for fuch or fuch a purpofe.
Thus, Oil hath an Aptizudc to burn, and Water to extin.
guilb Fire.
APTOTE, in Grammar, a Noun indeclinable, or which
is without any Variation of Cafe. See NOUN and CASE.
The Word is derived from the Greek Privative a, ape
,wzois, Cafps.
APUS, in Afironomy, the BRird of Paradife; one of
the Confiellations of the Southern Hemifphere, not vifible
in our Latitude. See CONSTELLATION.
APYREXY, in Medicine, the Intermiffion of a Fever
or Ague. See FEVER and AGUE.
The Word is form'd of the privative Particle o, and auto
Tgnis, Fire or Heat, or mvuI~tto, febricito, to be feverifh.
AQUA, in natural Hiflory, Phyficks, Chymiftry, Me.
dicine, kc. See WATER.
The Word is pure Latin, and fuppofed to be compound.
ed of a and qua, q. d. from which; alluding to the Opi-
nion that Water is the Bafis or Matter of all Bodies.
AQuA fortis, is a corrofive Liquor, ferving as a Men-
flruum wherewith to diffolve Silver, and all other Metals
except Goid. See MENSTLuUM, DISSOLUTION, METALS
tC.
'Aqua fortis is made of Salt-Petre, which is the only
Salt that will ace on Silver, See NITRE, SALT-PFETRE
and SILVER.
To prepare Aquta fortis, they mix either Sand or Alum,
or Vitriol, or the two laft together, with the Salt- Petre;
then diffill it by a violent Fire ; and catch the Fumes;
which condenfing in the Receiver, are the Aquatfortis.
If Come of thofe.Matters be not added to the Nitre, it
runs too readily, and thus prevents the Evaporation; but
when the Fufion is prevented, the parts of the Salt receiv-
ing more violent Impreffions from the Fire, are converted
into a volatile Spirit.
if to the Spirit of Nitre thus diftill'd, Sea-Salt or Sal-
Ammoniac be added; *it commences Aqua Regia, and will.
no longer diflolve Silver, but Gold. See Aqua REGIA.
Hence, to try whether or no Aqua fortis be pure ; put a
Grain of a Solution of Silver in Aqua fortis, into a like
Quantity of the Water in queflion: and if the Solution re-
mains without either the Water's turning milky, or the Sil-
ver precipitating, the Aqua fortis is pure.
Aqua for~tis is commonly held to have been invented A-
bout the Year 1300; tho' others will have it to bede
known in the Time of Moles.
Aqua fortis is a Liquor of various and exte1i~ve Ufce.-
It is very ufeful to Refiners for parting or Separating Silvtf
from Gold and Copper.    See PARTING, REFINING,
c .C.
To the Workers in Mofaic, for Raining and colOu
ing their Woods. See Mos&ic.
To Dyers in their Colours, and particularly Scarlet. Sed'
DYING, COLOUR, SCARLET, EC.                      C.
To other Artiffs, for the colouring of Bone and Ivoryf
which is done by fleeping the Matters therein, after firn1til
ing it with Copper, or Verdigreafe, &c.-Some alfo
into Aqua Regia, by diiTolving in it a fourth of its well
of Sal-Ammoniac, and then flain therewith Ivory Hf
and Bones, of a fine purple Colour. There are, alfo, BoCg
Bindets, who throw it on Leather, anl thereby make
wr   .


A P R


Z
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