“If the occupier of any premises, when requested by or on behalf of the local authority to state the name of the owner of the premises occupied by him, refuses or wilfully omits to disclose, or wilfully misstates the same, he shall (unless he shows cause to the satisfaction of the court for his refusal) be liable to a penalty not exceeding £5.”
O′CHRES. These are native earthy compounds of clay, coloured with oxide of iron, with frequently a little chalk, or magnesia. The differences in the colour arise partly from the quantity of iron present, and partly from the state of oxidation in which the iron is found. Several varieties are known in commerce—Brown ochre, French o., Oxford o., Red o., Roman o., Yellow o. All these, with the exception of the first and fourth, have a yellow colour. Armenian bole, Indian red, Venetian r., and Spanish brown, are also ochres.
All the ochres are darkened by calcination. The yellow ochres acquire a red or reddish-brown colour by this treatment. The pigment called ‘light red’ is thus prepared from yellow ochre.
ODONTAL′GIA. See Toothache.
O′DORAMENTS. Syn. Odoramenta, L. Substances employed in medicine on account of their odour. They differ from disinfectants, in only disguising, but not destroying, noxious vapours, &c. Ammonia, STRONG VINEGAR, and PASTILLES, furnish the most familiar examples of this class of substances. See Disinfectants, Perfumes, &c.
O′DOUR. The emanation of an odoriferous or scent-giving body. See Perfumes.
ŒNAN′THIC ETHER. See Ether (Œnanthic).
OFFIC′INAL. Syn. Officinalis, L. A term applied to substances or medicines ordered in the Pharmacopœia.
OIL. Syn. Oleum, L.; Huile, Fr. This name is given to numerous liquid or semi-liquid substances, expressed or drawn from animal or vegetable bodies; to various products of the distillation of bituminous minerals; and to several unctuous mixtures in perfumery and pharmacy. To facilitate reference, we have
grouped the principal substances generally called ‘oils’ into classes, under the following heads:—Oils (Drying); Oils (Empyreumatic): Oils (Fixed); Oils (Medicated); Oils (Mineral); Oils (Mixed); Oils (Perfumed); Oils (Volatile). See these articles also below:—