There is another sort of remedy, which is often of the highest service to men of learning, I mean chalybeate waters; but they should not send for them, they should go where they are to be drunk at the fountain head. I do not indeed despise those that are sent for; nay, I have known men of learning who, by my advice, drank Seltzer waters at home during the whole year, by which, and remitting somewhat of their application, they recovered their health. But it is still better to drink them at their source, for they are there in greater perfection; and the journey is of service, because, whilst it lasts, the sick are exempt from all domestick cares, are amused with a variety of objects, enjoy agreeable company, relax their minds, and recreate their bodies: and the journey alone is of so much service, that hypochondriac persons are often cured by visiting remote libraries. It would be as useless as it is impossible to enumerate all the waters that may be of service in repairing broken constitutions; for what nature intended as a most salutary remedy, it has liberally bestowed upon most regions. There are many in Switzerland; those of Aquia in Savoy, in my neighbourhood, deserve high praises; our waters of Rotula are still more to be recommended on account of the agreeableness of the place than their salubrious qualities; we must not forget those of Lausanne, the virtues of which have been demonstrated to me both by analysis and frequent observation; but the Seltzer waters surpass them all, at least in their reputation, if not in their qualities; those of Schwalbach and Spaw are still more powerful; and the Pyrmont waters are inferior to none. These are not all, but the principal remedies by which those disorders may be cured which men of learning bring upon themselves by over great application: but their disorders are not occasioned by study alone: as men they are subject to all the disorders of men; and then they should be treated according to the rules laid down by experience for curing each disorder. Physicians, however, should never forget, that the patient, whom they have under their care, is a man of learning, and cannot, of consequence, have the same strength with which most other men are endued: as they have relaxed fibres and thin blood, they are not so capable of bearing phlebotomy: but the intestines are often filled with a collection of filth, which must be purged off; so that, as the illustrious RAMAZZINI has long since observed, it is better to have recourse to other evacuations with them than to bleeding. Care should be always taken of the head of a learned patient, because it is easily disturbed, and grows delirious. This is of very bad consequence in disorders; for peevishness increases, which few learned patients are without; and, whilst the brain is agitated by a delirium, the necessary action of the nerves upon the body becomes slow, and so the powers of nature, which can alone effect a cure, are destroyed.