The preparations now most in vogue are solutions of alkaloids or aromatics in liquid paraffin, which is known under various fanciful names, such as alboline, adepsine oil, chrisma-line, glymol, oleum deelinae, paroleine, saxol, and vaseline oil. It dissolves camphor 1 in 4, carbolic acid 1 in 19, eucalyptol 1 in 9, iodoform 1 in 60, and menthol 1 in 7. Subjoined are examples of prescriptions:

The tincture of iodine forms a brownish-red precipitate of cocaine, which clots, entangling most of the menthol. A preparation with diffusible precipitate was made as follows: Dissolve cocaine alkaloid and menthol in 3J. of spirit; add the tincture of iodine, then the water, and shake gently.

Nos. I. and II. present no difficulty, except that 'ol. petrol, rect.'means, strictly, water-white petroleum for burning. The prescriber undoubtedly intended liquid paraffin. Note that 'oleum'in association with 'petroleum'is a redundancy. Glycerin should not be prescribed with liquid paraffin.

The following sprays are sometimes prescribed:

Carbolic acid gr, x., liquid paraffin to

Chloroform and liquid paraffin, equal parts.

Citrine ointment gr. XL., olive oil liquid paraffin to

Cocaine, gr. xxv., almond oil to

Copaiba 3J., ether 31J., liquid paraffin 3v.

Creosote 3SS., liquid paraffin to

Ether and liquid paraffin, equal parts.

Eucalyptus oil mxx., liquid paraffin

Iodine gr. j., menthol gr. v., liquid paraffin,

Menthol gr. v. to gr. xxx., liquid paraffin to

Tar oil 3ss., liquid paraffin to

Terebene 3j., liquid paraffin to

Aqueous sprays are also much prescribed. They are applied with a throat-spray or with a Seigle's steam-inhaler, in which the spray of the lotion is mixed with steam. The following are the strengths per ounce of solutions used in the Throat Hospital as sprays, those marked* having 15 minims of glycerin in each ounce:

Alum gr. v. to gr. xv.

* Borax gr. xv.

* Copper sulphate gr. v.

Glycerin of borax 3j. with S. V. R. 3j.

* Iron per chloride gr. v.

Iron sulphate gr. ij.

Potassium permanganate gr. j. with sodium chloride gr. v. Zinc chloride gr. x. to gr. xx. Zinc sulphate gr. x. to gr. xx.