C O A 
chevron between three coaches or. The ere# Is Phoebus 
drawn in a chariot all of the fecond, and the iiipporters 
two liorfes argent, armed or. Their motto, Pojl nubila 
Phoebus ; After clouds fun-fhine. Their hail is in Noble- 
Ilrcer. 
COACH'MAN,yi The driver of a coach : 
Thy nags, the leanefi things alive, 
So very hard thou lov’ft to drive; 
I heard thy anxious coachman fay, 
It colt thee more in whips than hay. Prior . 
To COA'CT, <v. n. To aft together; to aft in concert. 
Not ufed. v 
But if I tell how thefe two did coafl, 
Shall I not lye in publifhing a truth? Shakefpeare. 
COAC'TION, f \coaSlus , Lat.] Compulfion; force, 
either reftraining or impelling.— It had the pnffions in 
perfeft fubjeftion ; and though its command over them 
was ^perfuaiive and political, yet it had the force of coac¬ 
tion, and defpotical. South. 
COAC'TIVE , adj. Having the force o'f reftraining or 
impelling; compulfory; reftnetive.—TheLevitical priefts, 
in the old law, never arrogated unto themfelves any tem¬ 
poral or coafti-ve power. Raleigh .—Afting in concurrence. 
Obfolete. 
Imagination, 
With what’s unreal thou coaSlinje art. Shakefpeare. 
CO ADJU'MENJ, f. [from con and adjumentum, Lat.] 
Mutual affiitunce. 
COADJU'TANT,/. [from con and adjuto, Lat,] Help¬ 
ing ; operating: 
Thjacius coadjutant, and the roar 
Of fierce Euroclydon. Philips. 
COADJU'TOR, f. [from con and adjutor, Lat.] A fel¬ 
low-helper; an affiftant; an aftbeiate ; one engaged in the 
afliftance of another: 
A gownman of a different make, 
Whom Pallas, once Vanefia’s tutor, 
Had fix’d on for her coadjutor. Swift. 
In the canon law. One who is impowered or appointed 
to perform the duties of another, particularly of an aged 
infirm bilhop.—A bithop that is unprofitable to his cho- 
cefe ought to be.depefed, and no coajutor aftigned him. 
Alyjfe. 
COADJU'VANCY, f. from con and adjuvo, Lat.l Help ; 
concurrent help; contribution of help; co-operation.— 
Cryltal is a mineral body, in the difference of ftones, made 
of a lentous percolation of earth, drawn from the molt 
pure and limpid juice thereof; owing to the coldnefs of 
the earth fome concurrence and coadjuvancy, but not im¬ 
mediate determination and efficiency. Brown. 
COADUNA'TUS, jjfirt. adj. [from boaduno , to unite.] 
In botany, it means united or joined' together in fome 
exprefled manner, as coadunata folia, leaves joined together 
at-the bafe. 
COADU / NITION, f. [from con , ad, unitio, Lat.] The 
conjunftion of different fubftances into one mafs._Bo¬ 
dies feem to have an intrinfic principle of, or corruption 
from, the coadunifwn of particles endued with contrary 
qualities. Iiale. 
To COAG'MENT, as. a. [from con and agmen, Lat.] To 
congregate and heap together.—Had the world been coag- 
mented from that fuppofed fortuitous jumble, this hypo- 
thefis had been tolerable. Glanmille. 
COAGMENTA'TION,/. Coileftion, or coacervation, 
into one mafs; union ; conjunftion.—The third part refts 
in the well-joining, cementing, and coagmentationoi words, 
when it is fmooth, gentle, and fweet. ‘ Benjonfon. 
COA'GULABLE, adj. That which is capable of con¬ 
cretion.—Stones that are rich in vitriol, being often 
drenched with rain-water, the liquor will then extraft a 
fine and tranfparent fubftance, coagidable into vitriol. Boyle. 
To COA'GULATE, v. a. [ coagulo , Lat.] To force into 
C O A 
703 
concretions; as, by the affufion of fome other fubftance, 
to turn milk.—The milk in the ftomach of calves, which 
is coagulated by the runnet, is again diffolved and rendered 
fluid by the gall in the duodenum. Arbuthnot. 
To COA'GULATE, <v. n. To run into concretions, or 
congelations’.—About the third part of the oil olive, which 
was driven over into the receiver, did there coagulate into 
a whitifh body, alrnoft like butter. Boyle. 
COAGUL A'TION, f. Concretion; congelation; the 
not of coagulating;- the ftate of being coagulated The 
body formed by coagulation.—As the fubftance, of coagu¬ 
lations, is not merely, (aline, nothing diflblves them but 
what penetrates and relaxes at the fame time. Arbutbnot. 
COA'GULATIVE, adj. That which has the power of 
caufing concretion, or coagulation.—To manffeit the co - 
agidnti'vc power, we have fometimes in a minute arrefted 
the fluidity of new rpilk, and turned it into a curdled fub- 
llance, only by dexteroully mingling with it a few drops 
of good oil of vitriol. Boyle. 
COAGULA'TOR.y." That which caufes coagulation.— 
Coagulators of the humours, are thofe things which expel 
the moft fluid parts, as in the cafe of incralfating, or thick¬ 
ening; and by thofe things which fuck up lome of the 
fluid parts, as abforbents. Arbuthiiot. 
COAL, f. [col, Sax. kol, Germ, hole, Dut. kul, Danifti.] 
The common foflile fewel: 
But age, enforc’d, falls by her own confent; 
As coals to afhes, when the Ipirit’s 1 ’pent. Denham. 
The cinder of fcorched wood ; charcoal.—Whatfoever 
doth io alter a body, as it returneth hot again to that it 
was, may be called alteratio major; as when cheeie is 
made of curds, or coals of wood, or bricks of earth. Bre¬ 
con .—Fire ; any thing inflamed or ignited.—You have 
blown this coal betwixt my lord and me. Shakefpeare. 
The rage of jealoufy then fir’d his foul, 
And his face kindled like a burning coal. Dryden. 
Vegetable coals are commonly diftinguifhed by the name 
of Charcoal, which fee. The word coal, is with us al~ 
moft exclufively applied to denote mineral or pit-coal. 
Of this there are many varieties. They appear to confift 
of petroleum, confolidated with an earth chiefly of the ar¬ 
gillaceous kind. The legiflature only diftin'guiflies two 
kinds relative to the duties thereon ; namely, culm and 
caking-coal. The former does not coni’oiidate by a kind 
of fufion into larger mafles, when heated, as the latter 
does, and cannot therefore be applied to fuch a variety 
of ufes. 
Pit-coal is ufually found in ftrata in the earth, alrnoft 
always in mountains of (hi ft us or grit. It appears to be 
a general opinion, that this fubftance owes its origin to 
the decompolition of vegetable bodies. And, indeed, 
when we attend to the inflammable fubftances found in 
the earth, or in the mineral kingdom, we may perceive 
that very few, and moft probably none of them, can be 
truly fain to belong to it, but have been elaborated in 
the bodies of animals or vegetables. From the turf that 
is pared from the 1'urface of the earth, and owes its in¬ 
flammability to the roots of vegetables which are mixed 
with it, we may defeend to the peat, or black earth of 
the moors, in many lpecimens of which vegetable re¬ 
mains are ftill perceptible ; though in moft they appear 
to be deprived of every appearance of their organic tex¬ 
ture, their oily and inflammable nature oniy remaining; 
and from thence the tranlition to pit-coal is ealy. For, 
if we refleft on the vaft revolutions which the earth has 
certainly undergone through a long courfe of ages, by 
means of which its furface has been broken, dilplaced 
and inverted, from the aftions of floods, earthquakes, 
and the great convulfions of nature occafioned by volca¬ 
nic eruptions, it will be no improbable inference that the 
thin though extenfive ftrata of pit-coal, as well as the 
exfudations of naphtha, petroleum, an.d their modifica¬ 
tions, have all arifen from the burying of extenfive woody 
* 4 tafts 
