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prurigo, pilyriusis, psoriasis, impetigo, porrigo, ecthyma, and Scabies, Dr.Kennedy (London Medical Gazelle, vol. xxvi. [May 8, 1840] p. 260.) has foundits use beneficial. According to the tesümony of Mr. Davies and an anonymouswriter, {London Medical Gazette, vol. xxv. [March 20, 1840] p. 943.) it is avaluable application to ehilblains. In the treatment of diseases ofthejoinls it isused with great advantage. In erysipelas, I have seen it highly beneficial. Inphlegmonous inßammation, slonghing^ of the cellular membrane, inßammationof Che absorbcn'ls, goul, carbuncle, whitlow, lacerated, contused, and punetwedivounds, and bums and sealds, it is raost highly epoken of by Mr. Davies. Itstopical uses are, therefore, nearly as extensive as those of nitrate of silver.Moreover, it is used very much in the same classes of cases, and with the sameviews.

Administration. —Iodine is rarely administered alone, but generally in con-junetion with iodide of potassium, to the aeeount of which substance I must rei'erfor formulee for the combined exhibition of these substances.

In the administration of iodine, care should be taken to avoid gastric Irritation.On this aecount we should avoid giving it on an empty stomach. Exhibited im-mediately after a meal, its topical action is considerably diminished. This isespecially the case when amylaeeous substances (as potatoes, bread-pudding,sago, tapioca, and arrow-root) have been taken, as the iodine forms with thern aniodide of starch. Iodine has been given in the form of pills, in substance, indoses of about half a grain. But this mode of exhibition is objectionable, and isnow never resorted to.

1. TINCTURA IOBIMI, D. Tinctura lodinei, E.—Tinclure of Iodine. (Iodinegij. Eect. Spirit 3j. [by weight.] D.—The Edinburgh College Orders Iodine3j. Rect. Spirit fjxvj.) [This formula has been adopted by the U. S. P.] Prin-cipally valuable as a topical remedy. For this purpose it is applied as a paintby a camel's hair pencil. It is also used, mixed with four or six parts of soapliniment, as an embrocation. For internal exhibition it is inferior to the Tincturalodinii c.omposita, L. hereafter to be mentioned. In the first place, by keeping,part of the iodine is deposited in a crystalline form, so that the strength is apt tovary; secondly, it undergoes decomposition, especially when exposed to solarlight; the iodine abstracts hydrogen from the spirit, and forms hydriodic aeid,which, acting on some spirit, forms a little hydriodic ether. These are not theonly objeetions: when added to water, the iodine is deposited in a solid State,and" may thus irritate the stomach. The dose of it is r\[ v. to f 3ss. Each drachmof the Dublin tineture contains five grains of iodine. The best mode of exhi-biting it, to cover its fiavour, is Sherry wine. Where this is inadmissible, sugaredwater may be employed.

2. [LIQUOR I013INI COMPOSITUM, U. S.— Take of Iodine six drachms, Iodide of Po-tassium an ounce and a half, Distilled Water a pint; dissolve the iodine and iodideof potassium in the water. The dose is 20 drops. This preparation, adoptedby the U. S. Pharmacopoeia, closely approaches that of Lugol, given as the" Concentrated Solution of Iodine in Iodide of Potassium, (See article Iodide ofPotassium,) and varies only from the " Liquor Potassii Iodidi Compositus L."in strength.]

3. IOMBUI AMYLI; Iodide of Storch.— The following is Dr. Buchanan's(Lond. Med. Gaz. vol. xviii. p. 515.) formula for preparing this substance:—" Rub 24 grs. of iodine with a little water, and gradually add one ounce of finely-powdered starch: dry by a gentle heat, and preserve the powder in a well-stop-pered vessel." In persona not labouring under any dyspeptic ailment or consti-tutional delicaey of habit, Dr. Buchanan commences with half an ounce for adose, and increases this to an ounce three times a day,—equivalent to about 72grains of iodine daily. It frequently caused costiveness, attended with gripingpains of the bowels and pale-coloured evacuations. Sometimes, though rarely,

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