A sufficient Quantity of Vinegar ought to be put on board of each Transport, both for the Men to eat with their Victuals, and likewise for fumigating and washing between Decks occasionally. And a Quantity of Molosses, or coarse brown Sugar, and of Lemons, or their inspissated Juice, or Cream of Tartar, ought to be allowed for making the Punch, as well as for other Purposes.

If the Water become fœtid, the Quantity to be used in the Day ought to be sweetened by Means of the Ventilator contrived by the ingenious Dr. Hales[129] for that Purpose.

The Men ought to be brought upon Deck, and Roll called two or three Times a Day; they should be made to comb their Hair, and wash their Hands and Face every Day, and to shift themselves sometimes, if possible; and in every respect keep themselves as clean as the Nature of the Service will admit; and proper Exercises should be contrived, to keep them in Health.

All the Parts of the Ship ought to be kept very neat and clean; and the Hold, and all between Decks, ought to be scraped and swept daily; and every Morning, in fair Weather, ought likewise to be washed, and afterwards sprinkled or washed with warm Vinegar, while the Men are upon Deck[130].

When the Weather will permit, Fires of dried Wood may be lighted in Iron Kettles between Decks, and Centinels set over them, and the Fires sprinkled with Rosin or Bits of Rope dipt in Tar, or with some cheap Aromatic; and these Fires may be carried into all the Parts of the Ship that Safety will permit, in order to dry and purify the Air[131]. After this Operation all the Ports and Hatchways should be opened, and the Air in all the Parts of the Ship often renewed by working the Ventilators.

The Mens Hammocks and Beds ought to be brought up upon Deck in fair Weather, and well aired, and afterwards put in their Places, and Fires lighted below Decks.

When Troops, sent on an Expedition into warm Climates, arrive at the Place of their Destination, particular Care should be taken to guard them against the Diseases peculiar to such Climates, which are different from those common to our more northern Latitudes.

Dr. Lind says, that People coming first from a cold into a hot Climate are apt to have plethoric Symptoms; a Pain of the Head, Giddiness, a Sense of Weight, and Fulness of the Breast, and a slight Inflammation of the tunica conjunctiva; and that some are apt to be seized with ardent Fevers and Diarrhœas. And all Practitioners have observed, that New-Comers into warm Climates are at first liable to Fevers tending to the Ardent, and are very subject to Fevers of the remitting and intermitting Kind, which are the Endemics of all warm Countries at certain Seasons of the Year; and after some Time they are apt to fall into Fluxes, the Yellow Fever, and other Diseases depending on a putrescent State of the Juices. In military Expeditions these Disorders are liable to be complicated with Fevers of the Malignant or Hospital Kind, if Care is not taken to prevent it. And nothing has been found to be more productive of Diseases in those warm Climates, than indulging freely in the Use of Spirits and other strong fermented Liquors; exposing one’s self to the Damps, especially lying on the Ground after the Dews fall; and working hard, or using violent Exercise in the Heat of the Day.

The best Preservatives against Diseases in warm Climates have been found to be,—1. Temperance; a Diet of light and easy Digestion, composed more of vegetable than of animal Food; such as a small Portion of fresh Meat, joined with a sufficient Quantity of Vegetables; Rice, Indian Corn, and other Grains, and Roots of various Kinds, prepared in different Forms; well baked Bread; the moderate Use of ripe Fruits; and the free Use of mild cooling subacid Liquors, joined with a small Proportion of vinous or spirituous Liquors; carefully avoiding the too liberal Use of Wine, Spirits, or other strong fermented Liquors.—2. Great Care not to expose one’s self to the Damps of the Night, nor lie down to sleep on the Grass, or in woody moist Places, in the Day; and to avoid all violent Exercise in the Heat of the Sun.—3. Such Means as tend to support the Spirits; for Chearfulness has been observed to contribute as much to the Preservation of Health, as Fear and Dejection of Spirits to the Production of Diseases.—4. Keeping the Body clean, and bathing frequently in the Sea, or in a River, in the Morning.

And therefore, in warm Climates, Officers ought to be particularly careful to keep their Men sober and temperate; to procure them good Bread, and Plenty of Vegetables and fresh Meat, if possible; and where no other but salted Meat can be got, to make them boil a small Proportion of it in their Camp Kettles, along with Onions, Goarts, Rice, Carrots, Turnips, Greens, or any other wholesome Roots or Herbs which the Country affords, or they can get, and of these to prepare a good wholesome Soop for themselves; and where there is Plenty of the ripe acescent Fruits, which are reckoned wholesome, to distribute a moderate Quantity among the Soldiers daily, which will both help to preserve their Health, and prevent them from privately stealing and eating large Quantities to the Prejudice of their Health.—To encourage their Men, and keep up their Spirits.