The Invincible was also uncommonly healthy during this cruise, which may likewise be ascribed to good discipline, and to her having been more than three years in commission before sailing from England, whereby the men were brought into order, and accustomed to each other and to a sea life. This ship was almost singular in having no acute diseases for several months after arriving from Europe; but at length paid the tribute to the climate in May and June, as may be seen in the Table. From the account of the three frigates at the bottom of the list in the Table, it appears how much more healthy they are than ships of the line. The total complements of the three is exactly equal to that of one seventy-four-gun ship; but their whole sickness and mortality is less than that of any one ship of the line of that class, although the Triton was uncommonly sickly for a frigate. There seem to be several causes for the superior degree of health usually enjoyed by this smaller class of ships. There is less chance of mixtures of men in frigates, as their complement is smaller, and it is more easy for the captain and officers to keep an eye over a few men than a great number; for, in a great ship, there are generally men, who, concealing themselves in the most retired parts, no one takes cognizance of them, and they destroy themselves, and infect others, by their laziness and filth. In the next place, there is a greater proportion of volunteers and real seamen in frigates, and more landmen and pressed men in ships of the line, the former being more in request, on account of the greater chance of prize money. Lastly, a small ship is more easily ventilated, and the mass of foul air issuing from the hold, from the victuals, water, and other stores, as well as the effluvia exhaling from the men’s bodies, is less than in a large ship.