that the 19th, 51st, and 80th regiments, have been so very much reduced; and that it was this fever which proved so destructive in the late war with the king of Candy. Mr Christie writes me, that in its destructive malignancy and ravages, particularly on the Europeans in Ceylon, it has equalled the yellow fever of the West Indies. From many accounts of it, which I received while in India, I am convinced, that the dreadful fever which prevails in Batavia is the same disease. In Batavia, the mortality from this fever is prodigious; it is not exceeded by that from the plague in Egypt, or from the yellow fever in America. Different circumstances, it would appear, concur to the production of the disease, in a very aggravated form, in the Dutch settlement of Batavia; of which, we may mention the extreme unhealthiness of the situation, and the bad practice of the Dutch surgeons. Dr Griffith, surgeon to the naval hospitals in India, informed me, that, when our fleet lay off Batavia, in 1801, it prevailed very much; but that, when they got the management of patients early, they were generally successful in the treatment of the disease. Bencoolen is one of the most unhealthy of our eastern settlements, solely from the prevalence of this fever. In China, it appears likewise to be a frequent and fatal disease. Having said thus much on the identity of the fever which appeared in Egypt, with that which is seen in India, and in the eastern islands, I shall proceed to the treatment. The first step was to cleanse the primæ viæ, and some gave emetics: this, however, was not always necessary; and purging with calomel, and the neutral salts, appeared in most cases to answer the same intention. In the first stage, likewise, as particular symptoms called for them, venæsection was performed, blisters were applied, we determined to the skin, or gave opiates. However, if the fever was of any duration, the practice always was, to endeavour to affect the mouth as speedily as possible with mercury. This was the practice in continued fever, and in Egypt, as in India, we were very generally successful, if application was early made. In the destructive fever of Ceylon, Mr Christie says, that he has practised but with a moderate share of success: but that the affecting the system by mercury is by far the most successful of different modes of treatment which he had tried. He gave nitric-acid, but in a very small quantity. In the fleet, when stationed near Batavia, Dr Griffiths gave mercury more liberally than any practitioner I know. He likewise used the nitric-acid very freely, both externally and internally, and relied much on its combined use with mercury. By two very able practitioners, Dr Keir and Mr Stewart, the Salsette fever has been successfully treated by nitric-acid alone; purgatives having been previously exhibited. Some practitioners treated intermittents by bark, some by opium, or by giving this and the volatile alkali.