_Oleum Ricini Aromaticum (Ol. Ricin. Arom.), Aromatic Castor Oil, N.F._--Castor oil flavored with benzosulphinide, oil of cinnamon, oil of clove, vanillin and coumarin. USES: A partly successful attempt to render castor oil less disagreeable. DOSAGE: 15 Cc. or 4 fluidrachms (N.F.). =Oleum Rosmarini (Ol. Rosmar.), Oil of Rosemary, U.S.P.= (Rosemary Oil).--A volatile oil. Nearly insoluble in water; soluble in alcohol. ACTION AND USES: Aromatic flavor and carminative. DOSAGE: 0.2 Cc. or 3 minims (U.S.P.). =*Oleum Santali (Ol. Santal.), Oil of Santal, U.S.P.= (Santalwood Oil, Oil of Sandalwood).--A volatile oil. Nearly insoluble in water; soluble in alcohol. ACTION AND USES: Urinary disinfectant and stimulant. Used in subacute stages of cystitis and gonorrhea. DOSAGE: 0.5 Cc. or 8 minims (U.S.P.), preferably in capsules. =Oleum Sassafras (Ol. Sassaf.), Oil of Sassafras, U.S.P.= (Sassafras Oil).--A volatile oil. Nearly insoluble in water; soluble in alcohol. ACTION AND USES: Flavor; used externally as rubefacient counterirritant. =Oleum Sesami (Ol. Sesam.), Sesame Oil, U.S.P.= (Teel Oil, Benne Oil).--A fixed oil. ACTION AND USES: Emollient, used as substitute for olive oil. =*Oleum Sinapis Volatile (Ol. Sinap. Vol.), Volatile Oil of Mustard, U.S.P.= (Mustard Oil).--Produced synthetically or from black mustard seed. Nearly insoluble in water; soluble in alcohol. ACTION AND USES: Powerful irritant and rapid vesicant; employed as counterirritant dissolved in alcohol or fixed oils. _Linimentum Sinapis Compositum (Lin. Sinap. Co.), Compound Liniment of Mustard, N.F._--Volatile oil of mustard (3%), fluidextract of mezereum (20%) and camphor (6%) in castor oil and alcohol. USES: Complex and antiquated counterirritant. _Spiritus Sinapis (Sp. Sinap.), Spirit of Mustard, N.F._--Volatile oil of mustard (2%) in alcohol. USES: Rubefacient. =*Oleum Terebinthinae (Ol. Tereb.), Oil of Turpentine, U.S.P.= (Turpentine Oil, "Spirits of Turpentine").--A volatile oil obtained from the oleoresin of pine wood (turpentine). Nearly insoluble in water; soluble in alcohol. ACTION AND USES: Applied externally, rubefacient and counterirritant. For internal use, see Oleum Terebinthinae Rectificatum, below. _Oleum Terebinthinae Rectificatum (Ol. Tereb. Rect.), Rectified Oil of Turpentine, U.S.P._ (Rectified Turpentine Oil).--Redistilled oil of turpentine. USES: Antiseptic, anthelmintic, diuretic and carminative. Used to relieve tympanites. DOSAGE: 0.3 Cc. or 5 minims (U.S.P.). _Emulsum Olei Terebinthinae (Emuls. Ol. Tereb.), Emulsion of Oil of Turpentine, U.S.P._--Rectified oil of turpentine (15%) with expressed oil of almond, syrup, acacia and water. DOSAGE: 2 Cc. or 1/2 fluidrachm (U.S.P.). _Linimentum Terebinthinae (Lin. Terebinth.), Turpentine Liniment, U.S.P._ (Kentish's Ointment).--Rosin cerate (65%) in oil of turpentine.