7. Injection failing, which is very exceptional, a surgeon, with the necessary appliances, ought to be at once consulted, or should urgent symptoms arise from the irritation in the attempted extraction, the extraction by the incisions, galvano-cautery, boring out by trephine or conical file the centre of substance, and so causing its collapse; or even detachment of the auricle may be necessary.—_The Medical Press and Circular._ SELECTED PAPERS. THE YELLOW FEVER AT HAVANA—ITS NATURE AND TREATMENT. By CHARLES BELOT. (_Concluded from page 165_). It is at the moment even, of this remission, that sulphate of quinine must be administered in a dose of thirty-six grains taken at once in a half cup of black coffee without sugar. When the intermission is complete, its action is marvellous, the disease is immediately moderated; but if there is no remission, it is necessary to be prudent, for sulphate of quinine, because of its powerful action, can do much harm, if it is not indicated. When the disease commences with chills, followed by abundant sweats after the emetic and purgative, there is assurance, that there will be another remission, and then the sulphate of quinine is preëminently the remedy. But when there are no chills in the commencement of the disease, when the prominent symptoms are heat and dryness of the skin, and the fever continues, the exacerbation will not be long delayed, and no propitious moment can be found to administer the anti-periodic. In cases where sulphate of quinine cannot be employed, calomel is an excellent remedy, especially when in the absence of remission, the tongue shows itself humid, loaded, white, large, the gums engorged, the stools difficult, or when there is bilious diarrhœa. Under these circumstances, calomel taken in purgative doses every half hour, until the characteristic stools of this remedy appear. Very often, after the administration of calomel, remission of the fever and of the congestive symptoms takes place; the skin becomes moist, and sulphate of quinine, the effect of which will be more sure in proportion to the distinctness of the remission, may then be appropriately used. Its effect is assisted by oil and by emollient injections. If there was no chill in the commencement, aconite and tincture of digitalis will be pressed. These are ordinarily sufficient to bring the patient into full convalescence.