2. (Collier.) Sulphate of zinc, 2 dr.; water, 1 pint. As a counter-irritant in pains of the joints, periosteum, old sprains, &c.
=Lotion of Sulphuret of Sodium.= (Dr Barlow.) _Syn._ LOTIO SODII SULPHURETI. _Prep._ Sulphide of sodium, 2 dr.; white soap, 2-1/2 dr.; rectified spirit, 2 dr.; lime water, 7 oz. For ringworm.
=Lotion of Tannin.= (Mr Druitt.) _Syn._ LOTIO TANNINI. _Prep._ Tannic acid, 5 gr.; distilled water, 1 oz.; mix. On lint, covered with oil silk, to sore nipples.
=Lotion of Tar.= _Syn._ LOTIO PICIS LIQUIDÆ, L. _Prep._ (Saunders.) Quicklime, 6 oz.; water, 2-1/2 pints; slake, add of tar, 4 oz., and boil to one half. This liquid may be advantageously employed in various chronic skin diseases, especially those affecting the heads of children. See INFUSION OF TAR.
=Lotion of Valer'ian.= _Syn._ LOTIO VALERIANÆ, EMBROCATIO ANTIHYSTERICA, E. EMMENAGOGA, L. _Prep._ From tincture of valerian and proof spirit, equal parts. In hysteria, suppressions, &c.
=Lotion of Vera'trine.= _Syn._ LOTIO VERATRIÆ, L. _Prep._ (Dr Turnbull.) Veratrine, 20 to 60 gr.; rectified spirit, 2 oz. In gout, rheumatism, &c. It is extremely poisonous, and must only be used where the skin is sound, and then with great caution.
=Lotion of Ver'digris.= _Syn._ LOTIO ÆRUGINIS, L. CUPRI CITRATIS, L. _Prep._ From verdigris, 3 dr.; vinegar, 1/4 pint; water, 3/4 pint. As a wash for indolent, scrofulous, and venereal ulcers.
=Lotion of Vin'egar.= See ACETIC LOTION (_above_).
=Lotion, Yellow.= See MERCURIAL LOTION (_above_).
=LOUSE.= _Syn._ PEDICULUS. There are several species of this offensive parasite infesting the bodies of man and domesticated animals. The three varieties of lice found on the human skin are:--(1) The _Pediculus corporis_, (2) the _P. capitis_, (3) the _P. pubis_.
(1.) The _P. corporis_, the body louse, is of a dirty white colour, and varies from half to two lines in length. Its body is broad and elongated, with the margins divided into lobes, and covered with minute hairs; but it has a narrow thorax, furnished on each side with three legs, which terminate in claws. This creature produces great irritation of the skin, giving rise to a number of little pimples on it, which frequently discharge a watery fluid. It multiplies with extraordinary rapidity.