1000000030

H Y D

the

1I0ne i. of

fine oeep reo. blended with

rlufky

and

very

deep )'cllow, rhey

c~1I

ir a rubacelle But

Ihough the over.proportion of a Ilroog red in Ihis gem

ha, made

peop.le

..efer ir

rhe clafs of rubies, its evi·

dent mixlure of yello... Olews that

truly belongs to

Ihe hyacinths ,

Tlle hyacinlh la belle is found hOlh in Ihe Ean and

\Ven Indics. The oriental are the haroer bUllhe

American are often equal tO Ihem in col,'ur. The ,u·

bacelle is found only in the Ean Indies, and is gene·

rally brought over among Ihe rubies, bUI il 's of larle

value: Ihe otlm variclies are found iD Silefia and Bo·

hemia.

HYACINTHUS, in botany, a genus of the hexandria

monogynia

cla(~.

The corolla is bell fhaped ; and

there are thrce melli(erous pores inIhegermen. There

are 13 (pecies. only one of which,

viz.

Ihe non'(crip'

IUS, Englifh hyacinlh, or hare bells, is ' a Dalive of

Brilain,

HYADES, in anronomv, ("ven nars in Ihe bull's head,

famous among the pO;\S for Ihe bringing of "in. See

AST~ONOMY,

487.

HY \TIDES, in medicine, lillle tran(parenl veficl es or

bladders, fu

of waler, (ometimes,fllund lolilary, ,lOd

fomttimes in cluners, upon Ihe liver, an¡l vaTlous o–

Iher p.m, efpecial/y in hydropicaJ con/lllulions.

HYOATOSCOPI.'\, called alfo hydrom,ncy, a kind of

divinalió'n or melhod of forelell ing fU lure eveDI! by

mean! of water.

HYDNUM, in bOlany, a genus of Ihe eryplogamia

(ungi clafs : il is an horizonlal funglls. echinated or

befel \Vilh f1mp·poi,lIed fibreson liSunder part, There

are four fpecies, only one of whieh,

I'iz .

Ihe imbri–

ealum, or eommon hyd nu01, is a n"ive of Brilain.

HYDRA, in aOronomy See ASTRONO"'Y,

P. 487.

HYDRAGOGU ES, among

phyfi~ians,

remedies which

encuale a large quanlily pf warer in dropfies.

~incy

obft rves, Ihal Ihe fllonge/l ealharties chieAy

anfwer 10 lhe c1waéler of hydragogues, in Ihal by

Iheir forcibly fhaking and vellicallng Ihe

b~\Vels

and

Iheir appendages, they fqueeze OUI water enuugh 10

make the 1I00ls appear linle elfe.

T he principJIh' dragogllel, in the common opinion,

Ihe juiees of e\der. of the root of iris, of folda·

Delia, mechoaean, jalop,

Oc.

liYDRANG,IEA , in bUlany, a genus of the decandria

digynia clars. T he edpfule

h~s

two eells, andaoOllble ,

beak. There is bUI one fpecies, a nalive of

Vir~ioia.

HYDRAULlCS, Ihe fClence of the mOlion of fl uids,

and the eonilruélion of all kinds of infl rumenls and

machines rel, t,ng lherelO

As Ihe eonflruélion

hydraulic engines d' pends

upon lheknolVledge of Ihe

~encralldlV!

of nu"ls il will

be bmer 10 give Ihc deferip"on of Ihem under lhe dr-

licle l,ydro/larics

See HVD ROSTA1' ICS

HYDRENT EROCELE, in fUlgery, a fl'rcies of her–

nia wherein Ihe

inleOinc~

d<felllJ intu Ihe fcrulum,' to·

'her with a qUAlllily of " ater,

HYDROCE I.E, in [urgery OtnOles ally hernia

arifin~

f, "m waler;

~u.

pa'lirlll~rl y

IIf,'d for f" d,. one of

the fcrolum which forncllmcs g'

OIYS

10Ihe fize uf unc's

H Y D

Iteao, without pain, bUI exceeding Iroublefume 10 II! e

palienl

See SU RGER V.

I-IYDROCEPIIALU S, in furgery, aprelernalllra l diC.

tenlion

lhe head, 10 an uneommon fi ze , by a Chg–

nation and eXlravafali"n of the Iymph, which, when

eolleélcd wilhin (¡de of lhe bones of Ihe era",um, the

hydroeeph. lus is Ihen lermed inlernal; as it il e¡(ler–

nal. when

r<t~ined

betlVixl Ihe eommon inleguruems

and lhecrani,,", See SURGERY.

HYDROCHARIS, Ihe L. T'fLE WATER ' LILV,

bOlany, a genus of Ihe direcia deeandri. clafs. The

fpdlha of the male confins uf two \eaves, the ealix of

Ihree (egmtnts, ano Ihe eorolla

Ihree petals. The

ealix of lhe female confi/ls of Ihree fegmenls, and the

eorolla of Ihree pelals; il

h~s

fix lIyli

and Ihe cap–

(ulc has Ílx cdls and m,ny reeds. Tltere is but one

fpecies,

viz

the morfus rame, or frog bit, a nalive of

llnraio.

I;IYOROCORAX, in ornilhology. See BUCEaos.

HYDIWCOTYLE, in bOlany, a genus of the penuD·

dria digynia cI. I'. The umi ella IS fimple; the invo.

lucrumconfiJlsof four leaves ; Ihe perals are entir. , and

Ihe freds are roundífh and compre/red , There

are–

C.ve

fpecies, only one of lhem,

viz,

Ihe vulgari!,

march penny WOrt, or while ro!. is anarive of Brilain.

HYDROGRAPHY, Ihe art of meafuring and

deferibi~g

Ihe fea, rivers, lakes, and eanals,

Wilh regard 10 Ihe fea, il gives an account o( itl

lides, countcr lides, (oundings, bays , gulphs, ereeks,

Oc.

as alfo of Ihe rocks, fhelves, f.nds, fh.\lowl,

promonlo"es, harbours, the dillance and bearing of

One pon from aaol her, \\ ilh every IhlOg Ihat is re·

mHkdble, whelher out at fea, or on lhe enaO.

I-IYDROM,\NCY, a melhad of divinalion by waler,

praéld"d

loe ;,ncienLS

Ihis manner They filled

a cup or bowl of water : Ihen fanening a ring 10a pieee

of Ihread lied tOIheir fi nger, helrl 'l over Ihe waler,

and repealed a cerlain form of words, dcfiring to be

fallSfied \Vilh regard lO tbeir inqairy ; and if the

queftion was anfwered in the a/t rmalive, Ihe ring wouId

flrike the fides of Ihe bowl uf iLS own aceord,

Anolher kind of hydromancy \Vas tOlook upon the

waler in whieh Ihe

fig~rc

of feveral d:emons u(ed 10

appear. This expedirnl N"ma is

f.id

10 have made

ufe of, tOfetlle lhe eere01onie, oCrel'gion,

T his IVay of divinalionis f,id 10 have been ufed fir(l

by Ihe Per/ians, and aflcrwards ' pproved by Pylha.

gflf:lS.

HYDROMEL, .mong phyficianl, waler ¡rnrrcgnated

wi:h honey, either before or afler fermentalion.

Vino", hydro01el, eo0101only called mead, is faid 10

be goud tor Ihe grat'e!. See Ihe anicle MEAD .

HYDlWMET f.R, an innrumcnr 10 m" fure Ihe gra–

,'i'y, O., fi l)', "doril)', fOl ce,

6c.

orwaler andother

fi"i~s.

Se. H\'DRO!TATt CS,

Il YlllW l'll ACL in ho:.,ny, Src LOINA ,

Jl YüllOl'v:PH" LUS, in OIenicine and fu'gery. a tu–

mon r in .hr oavll, arifi ng frllm a eolleélion of " aler.

r lWJ'1l

ANA-:,

in n, lur.1hinClr)', a g('nu! of femi.

pdlucid gents, compufed of Cf)'lh l and rorlh ; Ihe

I.mr

iD&,rcditnl bcioS in Ia¡ge proportiun, and OIixcd

•

irupt rfeélly