Impetigo : Glycerite of Tannin, 345, an excellent application. Lead Acetate, 315, in solution. Zinc Oxide, 320, dusted over or ointment applied. Quinine, 208, usually improves. The Mineral Acids, 119, in intestinal indigestion.

Impotence: Phosphorus, or Zinc Phosphide, 134, 138, are efficient stimulants. Cannabislndica,557, also stimulates the function. Nux Vomica, 483, Sanguinaria, 361, also increase sexual activity, but differ in degree. Ergotin, 504, subcutaneously about the dorsal vein of the penis, or Fluid Extract of Ergot, 501, by the stomach, increase the vigor of the erections. Arsenic, 175, in functional impotence, and Iron Arseniate, 175, act as a tonic to the organs. Gold and Sodium Chloride, 297, has also slowly acting aphrodisiac effects.

Incontinence, Nocturnal : Belladonna or Atropine, 530, carried to the point of inducing some physiological action. Ergot, 501, in cases due to paresis of the muscular layer of the bladder. Iron, 152, sirup of the iodide, in weak, anaemic subjects.

Indigestion : Aliment, 56.60. In stomach indigestion, give foods digested chiefly in intestine, and in intestinal indigestion, food digested chiefly in stomach. Milk-Cure, 59. Pepsin, Pan-creatin, lngluvin, and Papain, 109, digestive ferments, 109, increase activity and thoroughness of digestion. Mineral Acids, 115, and Lactic Acid, 111, in atonic dyspepsia and indigestion. Alkalies, 217, and Alkaline Mineral Waters, 229, 233, for the indigestion of the obese, gouty, and rheumatic. Sulphurous Acid, 247, for indigestion with pasty vomiting, sarcina, etc. Bismuth, 164, and Dermatol, for painful indigestion and nausea ; also Hydrocyanic Acid, 702. Strychnine, 482, or tinct. nucis vom., to stimulate organs; also Ignatia, 488, and Picrotoxin, 491. Aloes, 757, in indigestion with torpor of large intestine, and pasty motions. Alcohol, 575, an excellent stomachic tonic in moderate quantity for the indigestion of the old.

Inflammation : Aliment, 63. Water, 84, the methods of hydrotherapy, to reduce heat. Alcohol, 575, in condition of systemic and cardiac depression, as an antipyretic, etc. Leeches, 814, very useful in certain local inflammations superficially situated, the systemic condition being sthenic. Aconite, 715, useful in inflammation of respiratory organs and parenchymatous inflammations in general. Veratrum Viride, 719, Gelsemium, 512, Arnica, 677, and especially Digitalis, 675, are valuable as arterial sedatives to diminish blood-supply to inflamed area, and cease to be beneficial when exudations begin. Belladonna, 527, in some catarrhal inflammations is highly useful. Alkalies, 217, especially the potash salts and ammonia, are very valuable in the exudation stage. Saline Cathartics, 750, to lower the blood-pressure and to cause excretion of products of waste. To the remedies acting on the circulation may be added Barium Chloride, 242, and Muscarine, 729, and under some circumstances Ergot, 501. Quinine, 201, in full quantity, especially when combined with opium, may abort an incipient inflammation. Opium, 638, is the most important remedy in serous inflammation. Tartar Emetic, 324, affords undoubted good results in some forms, notably in acute bronchitis. Pilocarpus, 684, has very satisfactory results in exudation in the eye, pleura, etc.

Insolation. (Sunstroke.) Cold Bath, 86, or douche or wet pack, for the state of high fever. Morphine, 640, hypo-dermatically. Turpentine Enema, 780, as a derivative. Brandy, 576, and Ammonia, 238, for heat-exhaustion, and the antipyretics, as Salicylic Acid, 396, Acetanilid, 426, Ex-algin, 427, Thymol, 430, Thymacetin, 530, Antipyrin, 411, Thallin, 406, Phenacetin, 418, and other synthetical products of the same series in heat fever.

Insomnia : Alcohol, 576, in the condition of cerebral anaemia, or in quantity to induce narcosis. Paraldehyde, 585, Urethan, 588, and its congeners, Phenyl-Urethan and Chloral-Urethan, are efficient hypnotics. Hypnone, 590, and Hypnal, 590, and Methylal, 586, act in a similar manner. Chloral, 616, the most direct and generally useful hypnotic. Belladonna, 532, in some morbid states with great restlessness and delirium ; but Hyoscyamine, 538, Hyoscine, 540, and Duboisine, 542, in sufficient quantity, are more frequently successful, especially in the insomnia of mania, puerperal mania, etc. Bromides, 652, a direct hypnotic, but the action is easily prevented. Morphine, 640, Morphine and Atropine, 644, is generally the best sleep-producer in cases of pain, in some kinds of mania, and in melancholia. Humulus, 646, a hop-pillow, has induced sleep ; lupuline is more effective. Phosphorus, 135, under some circumstances acts well. Galvanization, 465, of cervical sympathetic, causes sleep when circumstances are favorable. Water, 85, a tepid or warm bath at bed-hour, often succeeds. Massage, 102.

Intermittent Fever : Cinchona, 204. Quinine is prophylactic; rightly used prevents malarial infection, and in proper quantity arrests the paroxysms. In severe cases, combination with morphine is very effective. An attack impending may be arrested by Amyl Nitrite, 706, or Nitro-glycerin, 709, and Pilocarpine, 684, as respects the chill: Chloroform, 597, by inhalation, or by the stomach in a full dose, may prevent a chill. Salicin, 389, Salicylic Acid, 396, and Resorcin, 404, especially the last named, have decided anti-periodic qualities only inferior to quinine. Carbolic Acid, 381, hypodermatically, seems to be quite effective. Apiol, 794, also has very decided antiperiodic qualities. Cinchonidine Salicylate, 396, an antiperiodic of considerable value. Other substitutes for quinine are Nitric Acid, 118, which acts quite well in mild cases: Hy-drastine, 190, has some antiperiodic power, but is an active tetanizer ; Eucalyptus, 187, more adapted to chronic malarial poisoning, and for convalescence after attacks of fever; Oleoresin of Capsicum, 788, and * Nux Vomica, 482, adjuncts to other and more powerful remedies. Antipyrin, 411, Acetanilid, 426, and Salol, 409, and the antipyretics of the antiseptic group.

Intertrigo : Bismuth, 164, dusted over the surface. Zinc-Ointment, 320. Tannin, in powder, 346. Tannigen, 349, Alumnol, 338, mild and un-irritating applications.

Intestinal Catarrh : Ammonium Chloride, 237. Bismuth, 164, is one of the best remedies. Calomel, 294, in minute doses frequently. Silver Nitrate, 802, Copper Sulphate, 308, Lead Acetate, 313, Zinc Oxide and Sulphate, 319, are excellent remedies, valuable in the order named. The vegetable tonic astringents, Eucalyptus, 186, Hydrastis, 190, and those containing Tannic Acid, 343, are also useful. Salol, 408, of special value because of the action of the pancreatic secretion and the more powerful germicides and antiseptics, 375 et seq, especially Naphtalin and Ichthyol.

Intestinal Parasites : Calomel, 288, for the round worm ; also Hydrocyanic Acid, 701. Carbolic Acid, 382, but especially Glycerin, 821, for intestinal trichina. Remedies against the round worm, 771, Santonin, Spigelia, The Bitters, 181, especially Quassia against ascar-ides, etc. Papain, 108, a solvent.

Intussusception : Effervescent Enemata, 770 ; also Irrigation, 770, acting mechanically. Tobacco Enema, 694, to relax spasm. Morphine, 638, bypo-dermatically of first importance. Belladonna, 526.

Iritis : Atropine, 530, to prevent adhesions, and check inflammation by emptying vessels of iris. Eserine, 691, now much employed to break up adhesions and diminish intra-ocu-lar tension ; also Homatropine, 534. Pilocarpine, 683, to cause absorption of exudations and effusions. Mercury, 288, of great importance, as most cases are specific. Duboisine, 542, is much employed as a substitute for atropine; also Scopolamine, 544.