h, _Odische Erwiederungen an die
Herren Professoren Fortlage ... und Hofrath Carus_ (1856). His
_England und Schottland im Jahre 1844_ was translated by S.C. Davison
(1846).

CARUS, MARCUS AURELIUS, Roman emperor A.D. 282-283, was born probably at
Narbona (more correctly, Narona) in Illyria, but was educated at Rome.
He was a senator, and had filled various civil and military posts before
he was appointed prefect of the praetorian guards by the emperor Probus,
after whose murder at Sirmium he was proclaimed emperor by the soldiers.
Although Carus severely avenged the death of Probus, he was himself
suspected of having been an accessory to the deed. He does not seem to
have returned to Rome after his accession, but contented himself with an
announcement of the fact to the senate. Bestowing the title of Caesar
upon his sons Carinus and Numerianus, he left Carinus in charge of the
western portion of the empire, and took Numerianus with him on the
expedition against the Persians which had been contemplated by Probus.
Having defeated the Quadi and Sarmatians on the Danube, Carus proceeded
through Thrace and Asia Minor, conquered Mesopotamia, pressed on to
Seleucia and Ctesiphon, and carried his arms beyond the Tigris. But his
hopes of further conquest were cut short by his death. One day, after a
violent storm, it was announced that he was dead. His death was
variously attributed to disease, the effects of lightning, or a wound
received in a campaign against the Huns; but it seems more probable
that he was murdered by the soldiers, who were averse from further
campaigns against Persia, at the instigation of Arrius Aper, prefect of
the praetorian guard. Carus seems to have belied the hopes entertained
of him on his accession, and to have developed into a morose and
suspicious tyrant.

CARVACROL, or CYMOPHENOL, C10H13OH, or

CH3
/ \ OH
| |
\ /
C3H7 (iso),

a constituent of the ethereal oil of _Origanum hirtum_, oil of thyme,
oil obtained from pepperwort, and wild bergamot. It may be synthetically
prepared by the fusion of cymol sulphonic acid with caustic potash; by
the action of nitrous acid on 1-methyl-2-amino-4-propyl benzene; by
prolonged heating of 5 parts of camphor with 1 part of iodine; or by
heating carvol with glacial phosphoric acid. It is extracted from
Origanum oil by means of a 10% potash solution. It is a thick oil which
sets at -20 deg.C. to a mass of crystals of mel