Climate was enumerated under the predisposing causes of Phthisis. That of our own latitude affords an example. Its variableness, increased by contiguity to the ocean, together with the prevalence of the moist and chilling north-east winds, is probably the agent which produces this effect. The climate of Great Britain is not less unfavourable to health, from similar causes, with the addition of its greater moisture; for it is observed that cold combined with moisture is peculiarly dangerous to the consumptive. On the other hand, inland countries, not exposed to the moist winds from the ocean, are free from this disease. Hence, the inhabitants of Russia and other parts of the north of Europe, notwithstanding the severity of their climate, are very little affected by Consumption. The habits of the people, probably assist in producing this immunity from pulmonary disease. Sir John Sinclair, in a communication to Dr. Reid, attributes it in a great measure to the employment of furs, cloaks and other modes of clothing, which preserve an uniformity of warmth throughout the body; to the great care taken by all classes of people to preserve their feet from cold and damp; to the different modes of communicating heat to their apartments; and to the constant use of the vapour bath. Similar observations were made by Dr. Cogan, who in a letter to Dr. Beddoes, remarks that the people of Holland are exempt in a great degree from this disease, so prevalent among the English, and ascribes the difference to the contrast observable between the two countries, in the construction of their habitations, and in the peculiarities of dress. Debility from the want of accustomed stimuli, is mentioned by Dr. Hosack as another cause of consumption, and he instances those confined in the State Prison. The want of accustomed air and exercise, the deprivation of the use of spirituous liquors and good diet, to which the prisoners had been accustomed before their confinement, was observed by him to have produced this disease. Depressing passions of the mind, and a consequent too free use of spirituous liquors have also been noticed by authors among the predisposing causes of Consumption. The last of these causes which I shall notice, is the disposition of the system to form calculous deposits in the lungs, generally in consequence of a plethoric habit. Phthisis from this cause however is rare; of nine hundred patients examined by Bayle, only four were of this description.