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current nerves, &c. In its inferior o;; thoracic
portion, the cesophagus is entirely contained in
the posterior mediastinum j and enters the abdo-
men through the oesophageal aperture of the dia-
phragm. The oesophagus is composed of a very
strong muscular lay^r, sometimfes called Tunica
vaginalis grilas; formed, itself, -of two sets of
fibres, the external being generally longitudinal,
the internal transverse or annular. 2. Of a
mucous membrane which is soft, fine, thin, and
white, especially at its lower part. It ,is con-
tinuous, above, with the mucous membrane of
the pharynx. The mucous follicles, found be-
neath it, are not numerous, and have been called
(Esophageal glands, the arteries of the oeso-
phagus proceed, in the neck, froni the thyroid ;
In the chesti from the bronchial arteries knd
directly from the aorta; — in the abdonienj from
the inferior phrenic, and coronaria ventriculi.
Its veins empty themselves into the inferior
thyroid, the vena cava superior, the internal
naamrriary, azygos, bronchial, phrenic, and co-
ronaria ventriculi. Its lymphatics pass inta the
ganglia surrounding it. Its nerves are afforded
by the pharyngeal and pulmonary plexuses : by
the cardiac nerves ; the. thoracic ganglia, andi
especially, by the pneumogastrics and their re-
current branches.

CEsophagus Stjooenturiatus, Pharyngocele.

(ESTROMANIA, Nymphomania.

(ESTRITM, Clitoris.

(E STRUM Ven'eris^ (Estr2im vene'reum,
(Estrus ve?ie'reus ; from oi^TQot, cestrus, 'a
violent inipulse or desire.' A vehement desire
for sexual intercourse. With some, oestrum
signifies Clitoris.

CE'SYPUS, from oic, 'a sheep,' and guTro;,
'dirt' [?]. The greasy matter of unwashed
wool ; formerly employed in friction in diseased



OFFICINA, Pharmacopolium.




OFFICINAL, Officirta'Us, from offidna, 'a
shop.' - A.I1 «pithet for medicines found in the
shop of the apothecEury, ready prepared — nsua'-
lia; in opposition to. 'magistral or. exteTrfpora-
meoMj,— those prfeparej after .the prescription of
the physician. *~

OFFIUM, AfBon, OpSum. -


OFFUStATIO, Amaurosis.

OGLA, Oogala.

OGNON, a Corn— 0. Marin, Scilla.

Spring is a chalybeate, situate in Grepn county,
64 miles from, Cincinnati. It is sometimes fre-

OIE, Sorbus domestica.

OIGNON, Allium cepa. ; ,

OIL, O'leum, Els'on, (F.) Htfilk; from siiara,
'the olive.' A collective name, under which
two plasses of fluids are included, very. diffeA
rent from each -other : those belonging to the
one class, are viscid ; mawkish or almost in-
sipid; those of the other are nearly devoid of
viscidity, and are caustic and very volatile.
The former are called /a* ox fixed oils; the-
latter volatile or essential oils, or essences.

Oil OF Almonds, Oleum amygdalarum — o>
of Amber, rectified, see Succinum^ — o. A.nirfial,
Oleum animale^o. Animal, of Dipppl, Oleum
animale Dippelii — o. of Bay, Daphneleeon — o.
of Bays, Oleum laurinum — o. and Beeswax, Uu-
guentumcersB — o.of Benjamin or Benzoin,01eum
benzoini — o. Benne, see Sesamum orientalel

Oil, British. An empirical . preparation
often used in cases of sprains.

A committee of the Philadelphia College of
Pharmacy recommend the following form for
its preparation. — 01. Terebinth. Ol.Jjini.usita-
tiss. iia. f. §viij, Ol. Succini. 01. Juniper, aa.
f. giv. Petrol. BaHadens. f. ,^iij, Petrol. Ame-
ricam'. {Seneca Oil,) f. §j. M.

Oil of Cacao, Butter of Cacao^o. of the
Cashew nut, see' Anacairdiuju occidentale — o.
Castor, see Ricinus communis — o. of Chabert,
Oleum animale empyreumaticum Chaberti — o.
of Cinnamon, see Laurus cinnamomum — o. of
Cloves, Eugenia caryophyllata — o. Codliver, 0.
Jecoris aselli — o.of Cubebs, see Piper cub^ba —
o. of Cypress, Cyprinum oleum — o. of Dill, see
Anethum graveplens — o. Dippel's, Oleum ani-
male Dippelii — o. of Egg,- see Ovum-^o. Ethe-
real, Oleum .ffithereum — o. Flaxseed, see Linum

Oil, Fusel, Fousel oil, Potc^to oil. An
acrid volatile oil, formed in the manufacture of
potato brandy, and which is not easily separable
from it. Its chemical constitution is analogous
to, that of alcohol. It exhales a powerful and
peculiarly suffocating odour. S. g. .818. In
small doses, it is highly stimulating, — acting
like narcotics in general. In large doses it
destroys the mucous membranes of the stomach.

Oil, Baeelem. An empirical preparation
supposed to consist chiefly of petroleum, tur-
pentine, and balsam of sulphur. Used inter-
nally in renal and rheumatic affections.

Oil, Kkumholz, see Pinus mughos— o. of
Lemons, see Citrus medica — o. Lily, see Lilium
candidum— 0. of Mucilages, Oleum e raucila-
ginibus— 0. Neatsfoot, Oleum bubulum— o. of
Nicodemus, Nicodemi oleum— o. of Nutmegs,
see Myristica moschata — o. Olive, Oleum olivse
— 0. Palm, see Cocos butyracea— o. Paper, Py-

rothonide — o. of Pennyroyal, see Hedeomapule-
gioides— o.of Pike; Oleum luciipiscis— O.Rock,
Petrolaeum — o. Potato, Oil, Eusel— ^o. Rag, Py-
rothonide — o. of Roses, see Rosa centifolia — o.
of Rue, Peganelseoin, see'Ruta — o. of Spike,
Oleum terebinthinEB^o. of St. John's Wort, see
Hypericum perforatum — p. Salad, Oleum olivae
— o. of Scorpion, see Scorpion — o. Sulphuretted,
Balsamum sulphuris simplex — o. of Tartar, Li-
quor potassEs subcarbonatis — o. of Turpentine,
Oleum terebinthinae^o. of Turpentine, recti-
fied, Oleum terebinthioas rectificatum — o. of
Vitriol, Sulphuric acid— o. of Wine, Oleum
asthereum. ■ ,

Oils, Amimal, Olea animalia — o. Distilled,
Olea volatilia — o. Empyreurnatic, Olea empy-
reurpatica — o. Essential, Qlea volatilia — o.
■Ethereal, Olea volatiliai^o. Expressed, Olea
fix;a — 0. Fatty,'01ea fufa^-o. Fixed, Olea fixa —
o. Fugacious, Olea fugacia — o. Medicinal, Olea
medicinalia^-o. Volatile, Olea volatilia.

OILNDT, Juglans cinerea.

OILY Grain, Sesamum prientale.

OINTMENT, Unguentum— 0. of Antimony,
tartarized, Unguentum antimonii tartarizati —
0. Basilicon, Unguentum resinae — o. Bay, Un-
guentum laurinum — o. Blister, Cerate of can-
tharides — o. Blistering, grefen; Unguentum lyttse
medicatum — o. Blistering, milder, Unguen-
tum lyttse — 0. Blistering, yellow^ Unguentum
lyttse medicatum aliud — o. Blue, Unguentum
hydrargyri — o. Citrine, Unguentum hydrargyri
nitratis — o. of Creasote, Unguentum creasoti —
o. Cyrillp's, Unguentum niuriatis hydrargyri
oxygenati medicatns^-o. Digestive, simple, Un-
guentum digestivum simplex — o. Edinburgh,
see Unguentum veratri^o. Elderj Unguentum
sambuci — o. of Elemi, Unguentum elemi com-
positum— ^0. for the Eyes, (Smellome's,) see
Ceratum resinae — o. Golden, Unguentum hy-
drargyri nitrico-oxidi — o. Golden, Singleton's,
see Singleton's golden ointn^ent — o. Goulard's,
Ceratum plumbi" cornpositum— o. Green, Un-
guentum sambuci — b. Hellebore, white, Unguen-
tum veratri — o. of Hydriodate of potass, Un-
guentum potassae hydriodatis: — o. of lodiiie, Un-
guentum lodini — :0. of Iodine, compound, Un-
guentum iodini compositum — o. Itch, Unguen-
tum sulphuris compositum — o.'Itch, Bateman's,
see Unguentum sulphuratum alealinum ad sca-
biem — 0. Itch,, Bailey's, see Unguentum .sul-
phuratum ad scabipm — o. Itch, Helmerick's,
Unguentum sulphuratum alealinum ad scabiem
— 0. Issue, Dr. Physick's, see Unguentum lyt-
tae medicatum alipd — o. of white oxide of Lead,
Unguentum oxidi plumbi albi — o. of Lydia,
Bacaris — o. Marshmallow, Unguentum de Al-
thaea — 0. Mercurial, Unguentum hydrargyri — o.
of liitrate of Mercury,' Ungtientum hydrargyri
nitratis — o. of gray oxide of Mercury, Unguen-
tum oxidi hydrargyri cinereum — o. of nitric
oxyd of Mercury, Unguentum hydrargyri ni-
trico-oxydi — o. of Nitrous acid, Unguentum
acidi nitrosi — o. Plunkett's, for cancer, Plun-
kett's ointment — o. red Precipitate, Unguen-
tum hydrargyri nitrico-oxydi ' — o. of white
Precipitate, Unguentum hydrargyri praecipi-
tati albi — o. Resin, Ceratum resinse flavae —
o. Resin, black, Unguentum resinae nigrae — o.
of Rosewater, Unguentum aquae rosae — o_. Sol-
dier's, Martiatum unguentum — o. of Spanish
flies, Cerate of Cantharides, Unguentum lyttae
— 0. Spermaceti, Unguentum cetacei — o, of




Stramonium, Unguentum stramonii— o. of Sut-
acetate of copper, Unguentum subacetatis cupri
— 0. of Sugar of lead, Unguentum plumbi Su-
peracetatis— 0. Sulphur,, Unguentum sulphuris
— 0. Sulphur,^ compound, Unguentum sulphuris
compositum— K). Tar, Unguentum picis liquidee
— p. Tobacco, Unguentum Tabaci-^o. Tutty,
Unguentum oxidi zinci impuri — o. Verdigris,
Unguentum subacetatis cuprite. Wax, Un-
guentum cersE^-o. White, Unguentum oxidi
plumbi albi — o. Zinc, Unguentum -zinci — o. of
impure oxide of Zinc, Unguentum oxidi zinci

OiOCALYM'MA, O'iocalyftrum; from toior,.
'egg.,' and xaXuTrrsiv, 'to.'coV^r;' Membra'na
O'vuH cortiea'lis. The membrane of the egg-.
OLD AGE, Senectus.
OLD MAN, Artemisia abrotanum.
OLD WIFE'S. SHIRT, Liriodendron. '
OLEA AmMA'LIA,Animal oil,s, (F.)Hmles
amijiale». A name given to iixe'd oils, hold-
ing in solution the mucilaginous and gelatipous
principles of certain animals, as the Oil' of
frogs, ,Oil of' scorpions, Oil of spiders, &c.
Somctiitnesi also, the term animal oils is given
to /empyreumatic oils, produced during the de-
composition of animal substances by, heat.
Olea Destillata, 0, volatilia.
Olisa Emptreumat'ica, Empyretmiat'ic oils,
(F.) Huiles empyreumatiqtces. Oils which have
an empyreumatic or burnt sniell. They are
obtaiaed by; treating, vegetable or animal mat-
ter by heat, in close vessels. They do' not
exist in organized bodies, but are formed dui;ing
their decomposition by fire. The animal oilof
Dippel is an empyreumatic oil. , ' »

Olea Eueop/E'a, Oli'va, Olea sati'va. The
Olive tree, tXai'a^ Else'a, {7.)'0livier, (Fruit)
Olive. Nat. Ord'. Jasmineas. Sex. Syst. Dian-
dria Monogynia. The fruit of the olive tree,
when pickled, is ' extremely grateful to some,
stomachs., Olives, as met with in the." shops,
are prepared from the green, unripe fruit, re-
peate^dly steeped in water. To this, some quick-
lime oralkaline salt is added, and afterwards,
they are washed and preserved in a pickle of
common salt and Water. From this fruit is
prepared the Olive oil or Salad oil of the Phar-
macopoeias, vvhich is obtained by grinding and
pressing the olives, wheh thoroughly ripe.
The finer aftd purer oil issues first by gefltle
pressure, and the inferior sort on heating What
is left and pressing it more, strongly. See
Oleum Olivse. In Calabria, an odorous resin
exudes from its trunk, which is employed as a
perfume by the Neapolitans.

A gum flows from certain wild olives, in
warm <:ountries, which consists,^ according to
Pelletier, of a resinj a little benzoic acid', and a
peculiar substance, called Olivile. It is in yel-
low masses, of a slightly acrid taste, and of a
vanilla smell. It is called Olex gummi, O.
resi'na, aW O, bals' amum, (F.) Gomme olivier,
and is esteemed astringent and detersive.

Olea Fixa vel Pin'suia, Express'ed oils,
Fixed oils. Fatty oils, (F.) Huiles fixes ou
grasses. All the oils obtained from the seeds
or pericarps of vegetables, without distillation,
and which are viscid, but slightly odorous and
sapid; lighter than water, and insoluble in al-
cohol. The rancidity of oils depends on the
absprption of oxygen, and, therefore, they

should be Itept in bulk as much as possible ;
and in,narrow-rieckeiJ bottles, so that a very
small surface only can be exposed to the air.
All the fixed oils are emollient, and, in a cer-
tain dose, they act as purgatives and. emetics.
They are prepared by expressing the fruit or
seed containing them.

Olea Fuqa'cia, Fuga'cious oils, (F.) Huiles
fugaees. A name given to oils which are so
volatile that, in order to obtain them, recourse
must be had to a different proce(ss frofn that
employed' for other essential' oils. Such' are
the oils of jessaniine, lily, violet, &c.

Olea Medicina'lia, Medic"inal oils,(¥.)
Huiles Medici?mles. A hame given to oils,
prepared by macerating, infusing, or boiling
medicinal substances in olive or any other fixed
oils. These oils may then be regarded as oily
solutions of certain medicinal substances ;
whence they can never be simple. They have,
however, been divided into simple and com-
pound medicinal oils. To the former belong
the Oils Of St. John's wort, of the Soldnmn ni-
grum, &c.; to the -other — which have often
been called Oily balsams, (F.) Baumes huileux,
• — the Balsamis of Fioraventi, Metz,&cc. Me-
dicinal oils are, almost always, employed ex-

Olea Yolatil'iaj Olea destilla'tfi, V'ol'atlle
oils, jEthero'lea, Ethe'real oils. Essential oils',
Distil'led oils, Es'sentes, (F.) Huiles volatiles,
H. essentielles . Oils found in aromatic vege-
table's, and in every part of them, except in the
interior of the seeds. The majority are ob-
tained by distillation; but some by expression-..
They possess ' unctuosity, inflammability, and
viscidity, like the fixed oilS; but they are ge-
nerally odoriferous, pungent, and acrid. The
greater part are lighter than vvat^r; but some
are heavier, and congeal at a moderate tempe-
rature. They dissolve, in snrfall > quantity, , in
distilled water, by simple agitation. Almost
all are soluble in alcchol. The odour and taste
are the usual tests of their goodness. To pre-
serve them, they should be kept in a cool place,
in small bottles quite full and well corked.
"Volatile oils .are possessed'of the aromatic pro-
perties 'of the plants whence they are obtained.
They are all, when applied externally, stimu-
lant and rubefacient.

OLEAG'TNOUS, Oleagino'svs, Oleo'stis.
Oily; containing oil, — as ■> ah 6Uagi?ious or oily

- OLEA'MEN, Oleamen'tnm. Any soft oint-
ment prepared of oil Scriboriius.

OLEANDER,. Rhododendron chrysanthe-

OLECRANARTHRI'TIS, from c»X5;-5avur,
'the olecranon,' aj^^ov, 'joint,' and itis, de-
noting inflammation. Inflammation of the el-
bow joint.

OLEC'RANON, Olecra'non, Olec'ranvm.,
Olec'ranon mob'ilB ; from maevij, 'the' elbow,'
and xgavov, ' the head.' Acrole'nion, Additamen'-
tum neca'twm, Ancon, Froces's2ts anconeus,
Glans seu Coro'na seu Coro'na posterior seu
Additamen'tum unca'tum Ulna, Vertex Cu'biti
Patel'ln fixa. Rostrum extern'um seu poste'rins.
Top of the cubit. Head or projection of the
elbow. A large process at the upper extremity
of the ulna, on which we lean. When this
process is fractured, it is apt to be drawn up by




the triceps; and much care is required, to keep
the parts in apposition.

'the elbow,' x^xvov, 'the head,' and artkrocace,
A name given by Rust to inflammation .of the
articular surfaces of thfe elbow.

OLENE, Ulna. ■ ^

Ceratum Galeni.

OLEO-SACCHARUM, Elseo-saccharum.

OLEOSUS, Oleaginous.'

01ette,.in the department Pyretiees Orientales,
is a thermal spring, which raises, the thermo-
meter to 190° F,ahr. It is the hottest_in Fran<ie.

OLEUM, Oil — o. Abietisj see Pinus picea^ —
o. Absinthii, Artemisia absinthium, (oil of) — ;o;
Aeusticum, Haile acoustique.

Oleum .^the'eeum, JEt/ie'real oil (formed
in the distillation of ethers) Oleum vini, Oil of
wine, (F.) Suile douce de vin. A peculialr olea-
ginous matter, obtained by continuing the dis-
tillation, after the whole of the sulphuric ether
has passed over in the process for the prepfira-
tion of the latter. It4s"used only as an ingre-
dient in the compound spirit of ether.

Oleum Ammoniatum, Linimentum ammonia;

Oleum Amygdala'kum, Oleum miiyg'dala,
Oil of Almonds, (FO Hidh d'amandes. (Ex-
pressed from both sweet and bitter ^ almonds,
Amygdalus , communis. §xvj of almonds
yield _^v of oil.) It is inodorous, insipid, and
of a pale straw colour, and is employed as a de-
mulcent and emollient. . ,

Oleum Anaoaedii, see Anacai;diura occiden-

Oleum Anima'le, An'imal oil,. (F.) SiiHe
■ t{i- ■

An oil, obtained by t|ie decomposi-
tion of the immediate principles of animals, sub-
jected to the action of beat, ' It is fetid, and
always contains a certain quantity of subcarbo-
nate of ammonia, gee Olea Empyreumatica.
The name animal oil is sometimes also given
to the fat contained in the fatty vesicles. The
composition of this fat does not, indeed,, differ
from that of the fixed oil. . ,

Oleum Anima'le Dippe'li:, AniUul oil' of
Dippel, Oleum cornii cervi, 0. C. C. rectifiia'-
tum. Animal oil, Dippel's oil. Oleum pyro-ani-
pia'U deptora'tum, O. animale cethe'reum, Py-
ro'leum' os'sium rectifica'tum, (¥.) tluile ani-
male de Vippel, Huile de asrne de (erf, is ob-
tained by distilling animal matters, especially
hartshorn, 'on the naked fire. ' The subcarbo-
nate of ammonia, which it contains, renders it
partly soluble in water, and communicates to
it the stimulant properties for whieh it is used
in medicine. It is employed as an antispasmo-

Oleum Anima'le EmpyeeumaT'icum CgA-
bee'ti, 0. Empyrevmal'icum Chaber'ti, Empy-
reumat'ic oil df Chabert, Oil of Chabert, is
made by adding one part of animal oil to three
parts of oil of turpentine, leaving them to com-
bine for four days, and then distilling three
parts. An effective anthelmintic. Dose, a tea-
spoonful three times a day. ^

Oleum Animaliza'tum pee Inpusio nem, (F.)
Buile animalisee par infusion, Suile aroma-
tique, H. de petits chiens. A preparation, for-
merly esteemed tonic and cephalic. It was ob-
tained by boiling new-born puppies in oil, first

depriving them of their blood, skin, and inl
tines. When the decoction was cold, ori
nuta, thyme, pennyroyal, St. Johns-wort, i
inarjoram were added.

Ojieum, Anisi, see Pimplnelia antsum-
Aurantii, see Citrus aurarttium — o. Balanini
Guilandijia moringa. (oleum) — o. Balsami,
Amyris opobalsamnm.

OleusTBenzo'ini, Oil of Benzoin ot Ben
min. -An oil obtained by heating, in a si
bath, the matter which remains after benz
acid has been separated from benzoin by
aid of heat., It has been regarded as balsai
and sudorific.

Oleum Beegamii, see Bergamote.

Oleum Bu'pulum, Neats-fo'ot^ oil. The '
prepared from the bones of Bos Domesticus.
is obtained by boiling in water for a long ti
the feet of the ox, previously deprived of i
hoof. It is introduced into the officinal list
the Ph. U. S. as an ingredienfof the ointrai
of nitrate of mercury.

Oleum Cacao Spissatum, Butter of cacao
0. Cajjiputi, Caieput (oil) — o. Camphdratu
Linimentum camphoras^o. Cari seu Carui, C
rum (oleum) — o. Caryophylli, see Eugenia (
ryophyllata. '

OiEUM Ced''RV!>vtsi, Essentia de cedro,(\
Huile de cedrat. The oil of the peel of citroi
obtained in Italy in a particular manner, wii
out distillation,

OtEUM Chaeer-ti, 0. animale empyreuma
cum Chaberti — o. Chenopodii, see Chenopo
um anthelminticum — o. Cicinum, see Ricir
communis — o. Cinnamomi, see Laurus oini
momum — o. Cornii cejvi, O. animale Dippe
— 0. Cubeb», see Piper cubebse — o. Euphorb
lathyridis, see Euphorbia lathyris^-o. Fixi
nucum cocos butyraceae, see Cocos butyrac
^ — 0. Foeniculi, see Anethum — o. 6abiannm, I
trolasum-r- p. Gallinae, Alkale — o. Gaultheri
see Gauliheria— 0. Hedeom*, see Hede^ma j
legioides — o. Hyperici, see Hypericum perfbi
tum — 0. Infernale, 0. Ricini.

Oleum Jec.'oeis Aselli, O. Mor'rhua,
Jecino'ris Aselli, Cbdliver Oil', (F.) Huile
morne. The animal oil. Which appears tine
this name in commerce, is obtained from sev
ral of the species belonging to the genus Gadi
The clearest sorts are generally used. It a
pears to have no sensible effects upon the ec
noray ; but has been given in strumous affe
tions, rheumatism, chronic cutaneous diseasf
and tumours of the mammse. The dose for i
adult is from f. gij to f, .^iss.

Oleum Junipeei, see Juniperis communis
o. de Kerva, see Ricinus communis — cr. KerT
num, see Ricinus communis.

Oleum Lauei'num, Oleum lauri. Oil of bay
An oil obtained from b^yberries, and sometim
used in sprains and bruises, unattended with i

Oleum Laueinum, Daphnelson, UngUentu
L. — 0. Lavendulas, see Lavendula — o. Lentis(
num, Schinelaeon — o. Limonis, see Citrus m
dica — o. Lini, see Linum jisitatissinium —
Lini cum cake, Linimentum aquae calcis.

Oleum Lu'cii Pisois, Oil of Pike. From t
liver of the Esox ludus an oil is spontaneous
separated, which is used in some countries
destroy specks on the cornea.

Oleum Malabathei, see Malabathrum—
Marias, see Fagara octandra — o. Melaleuca le




codendri, Caieput (oil)— o. Menthae piperita,'
see Mentha piperita, — o. Menthae vlTidis, Men-
tha viridis — o. Monardse-, Monarda punctata —
6. MorrhusB, 0, jecbris aselU.

OtEUM E Mucjl'agin'ibus, Oil of Mu'dlage^. .
{Rad^. aUhsese rec. Bss. sera, lini, sem. fanu-
grcBci, aa §iij, aqua Oij. Boil for half an hour;,
add ol: oUv. Oiv; continue the boiling till the
water is nearly consumed, and pout off the oil.)

. Oleum MtristicsIj see Myiristica moschata
— 0, Nerbli, see Citrus aurantium.

Oleum Oli'v^e, O. oliva'Tum, Olive oil, Sa-
lad oil. An inodorous, insipid, and transparent
oil; obtained by expression from the olive,
■Vfhen ripe. It is demulcent and emollient, —
possessing the qualities of the fixed oils in ge-
neral . V

An inferior kind, obtained by boiling olives
in water, and skimming, the oil from the
surface, is also used in Pharmacy. See'Olea

Oleum Omphacinum, Omotribes— o.Origafli,
see Origanum — o. Oxydi cupri viride. Balsam,
green, of Metz— o. Palmee, see Cocos butyracea
— 0. Palmes liquidum, see Ricinus communis —
0. Petrae, Petrojasum — o. Petrae album, Naphtha
— 0. Picinum, Brutia, Pisselaeum-rO. Pimentse
see Myrtus pimentar— o. Pini purissimum, O. te-
rebiathinae rectificatum — o. Pulegii, see Men-
tha pulegium — o. Pyro-animale, O. animale
Dippelii — o. Rieini,'see Ricinus communis^o
Eosae, see Rosa tentifoliaT-o. Rosarum, Rhode-
laeon — o. RutaceUni, Pegaiielaeon — ^o. Rosmarini,
see Rosmarinus — o, Rutas, see Ruta — o. Sabinee,
see Juniperus Sabina — o. Sassafras, see Laurus
Sassafras — o-. Sesairii, see Sesamum orientale —
o. Sinapis, see Sinapis — o. Spicas vulgaris, O.
terebinthinae — 6. Succini, see Succinum — 6.
Succini rectificatum, see. Succinum,

Oleum , Sulphuea'tiim, Bal'samiim sulpk'-
uris simplex, Sulph'urated oil. {Sulphur, lot.
gij, olivm olei ffij. Heat the oil in a large iron
pot, and throw in the sulphur by degrees; stir-
ring the mixture after each addition till they
unite.) It is stimulating, and was formerly
much used in coughs, asthmar, &c., and, exter-
nally, to foul ulcers.

Oleum Taetaei per Deliquium, Liquor po-
tassae subcarbonatis — o. Templinum, see Pinus

Oleum TEEEBI^I'TH1N^, Oil of turpentine.
The volatile oil of thfe juice of Piniis palustris,
and other species of Pinus.

Oleum Teeebin'thin/e Reotifioa'tum, Ole-,
um pini puris'simum. Rectified -oil of turpen-
tine. Oleum terebin'tkind athe'reum, Sp.' of tur-
pentine. ■ CoTrimon oil of turpentine is also called
Common^ oil of Spike, X)leum, spicee vvXga're.
{Olei terebinth. Ojj aqua Oiv. Distil over the
oil.) It is stimulant, diuretic, anthelmintic,
and rubefacient. Dose, ^ss to .^j.

Guestonian embrocation for Rheumatism con-
sists otol. terebinth, ol. oliv. aa §iss, acid, sulph.
dil. giij.

Oleum THEOEROMffi Cacao Expeessum, But-
ter of cacao — o. Tiglii, Croton tiglium — o. Vi-
ni, O. aethereum — o. Vitrioli, Sulphuric acid.

OLFACTION, Olfac'ttis, from olfacere, for
odefacere, {odor, and facere,) Osphre'sis, Os-
phra'sia, Osphre'sia, Osme'sis, Odora'tio, Odo-
ra'tus, Senszis osmomet'rieus. Sense of smell.
Smelling, (F.) Odorat. The sense by which

we perceive the impressions made on the olfac-
tory nerves by the odorous particles suspended
in the atmosphere. The olfactory nerve, or 1st
pair, has usually been considered the great nerve
of smell; and it is probably the nerve of special
Sensibility, geiieral sensibility being comrnuni-
cated by the branches of the 5th pair, distri-

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