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Medicinally it is stimulant, and tonic in doses of y\y to u^xxxvj onsugar in phthisis, atony, marasmus, &c,

/Ether Rectificatus. L. AL. Sulphuricus. E. Rectified Sul-phuric Ether. Procured by dissolving gss of fused potass in |ij ofdistilled water, adding ^xiv of sulphuric ether, shaking it till theyare mixed, and distilled over gvij at a heat of 120° Fahr. Add tothis Jix of distilled water, and, leaving it to subside, pour off thefloating rectified ether. It is very inflammable, and accidents mayhappen in pouring it out by candle-light.Decomposition. The fused potass attracts the acid, and tends to pre-vent the water from becoming too volatile.Adulterated sometimes with alcohol and sulphuric acid, but these may

be discovered by the spec, grav., pure ether being -732.Medicinally it is hot, pungent, fragrant, volatile, and an excellentdiffusible stimulant and antispasmodic, in doses of rt^xx to 5 jss inwater, in spasms, convulsions, epilepsy, hysteria, hypochondriasis, ce-phalalgia, and nervous pains. Externally it is refrigerant, stimulant,and, when prevented from evaporating, rubefacient in head-ache,tooth-ache, and rheumatism. When rectified with manganese, itmay be dropped into the ear, in ear-ache and deafness.

Enters into Spir. jEther. Sulphuric. L.

.-Ether Sulphuricus. L. D. P. Sulphuric or Vitriolic Ether.JElher vitriolicus. O. Procured by putting into a glass retort ibjss-of rectified spirit, and pouring over it gradually the same quantity ofsulphuric acid, keeping the heat under 120° Fahr. and then distil-ling over a sand heat of 200°.Decomposition. This has still to be discovered, though some maintain,,and others deny, that the acid is decomposed in the process. It has,similar properties to the preceding.

.Ether Sulphuricus cum Alcohole Aromaticus. E. AromatieSulphuric Ether with Alcohol. Prepared by digesting for sevendays Jj each of cinnamon bark, and of cardamom seeds bruised, 51Jof long pepper ground, Ibijss of sulphuric ether with alcohol, andfiltering through paper.Medicinally it is a warm aromatic stimulant and stomachic in dyspepsia,flatulence, and debility, in doses of ^ ss to ^ij in bitter infusions.

.Ether Vitriolicus. O. See jEtiier Sulphuricus.

jEthiops Martialis. O. See Oxydum Ferri Nigrum. P.

jEthiops Mineralis. O. See Sulfhuretum Hydrargyri Nigrum.JEthiops mineral is used in farriery.

jEthiops Antimoxialis Reductus. O. Antimonial iEthiops Re-duced. Prepared by grinding in a mortar ftss of antimony andsthiops mineral. Given in the skin diseases of horses and cattle, inthe dose of x\ or more, twice a dav.