Kitabı oku: «Observations on the Diseases of Seamen», sayfa 10

Nothing that I have collected from my own observation, or that of others, has been neglected under this head, except one particular caution with regard to the preparation of the victuals. The large utensils employed to boil the provisions are made of copper, and it sometimes happens from neglect that these are allowed to contract a rust, which is one of the most active poisons we know. The neglect consists chiefly in allowing any thing acid, or what is liable to become acid, such as gruel or burgoo, to remain for a length of time without being washed out; for when victuals have been prepared in the boilers thus uncleaned, they produce the most violent effects, even to the loss of life, as once happened in a ship belonging to our fleet⁷⁴.

SECT. II. Of Drink

As the solid part of sea diet is very dry and hard, and as the salt it contains is apt to excite thirst, a freer use of liquids than at land is necessary, particularly in a hot climate.

It has been the custom, as far back as we know, to allow seamen the use of some sort of fermented liquor. We need hardly inquire if this is salutary or not; for it would be impossible at any rate to withhold it, since it is an article of luxury, and a gratification which the men would claim as their right. There is a great propensity in seamen to intoxicating liquors, which is probably owing to the hardships they undergo, and to the variety and irregularity of a sea life. But there is reason to think that all sorts of fermented liquors, except distilled spirits, are conducive to health at sea.

There is no doubt that malt liquor is extremely wholesome and antiscorbutic. The common quantity of small beer allowed daily is so liberal, that few men make use of their whole allowance; and there is no objection to the constant use of it, except that it is apt to spoil in the course of a few weeks, and that upon foreign stations the stock can seldom be renewed. One of the greatest improvements that could be made in the victualling of the navy would be the introduction of porter⁷⁵, which can be preserved in any climate for any length of time that may be necessary.

Spruce beer seems to possess similar and equal virtues with malt liquor and it has this advantage, that the materials of it can at all times be carried about and used occasionally. It agrees with malt liquor in being a fermented vegetable sweet, the principal ingredient of it being melasses. The other ingredient, from which it takes its name, being a balsamic substance, seems to be more medicinal and antiscorbutic than hops, and is therefore, perhaps, preferable to malt liquor. There have been sufficient proofs of its virtues in single ships; and all the men of war that go to America and the West Indies might be conveniently supplied with it. Admiral Pigot provided a sufficient quantity for the whole fleet; but the peace coming on prevented the trial of it.

The most salutary kind of drink next to malt liquor, and spruce beer, is wine. The benefit which the fleet derived from it at different times, and the advantage it has over spirits has been often taken notice of in the former part of this work. It seems to be owing to this that the French fleet sometimes enjoys superior health to ours, and is less subject to the scurvy⁷⁶. Wine is also preferable to every other medicine in that low fever with which ships are so much infested; and there is no cordial equal to good wine in recruiting men who are recovering.

Spirits differ from wine in this respect, that they are a mere chemical liquor, incapable of assimilation with our fluids, having lost in distillation the native vegetable principle in which the whole of its nutritious quality and great part of its medical virtue resides.

The abuse of spirituous liquors is extremely pernicious every where, both as an interruption to duty, and as it is injurious to health. It is particularly so in the West Indies, both because the rum is of a bad and unwholesome quality, and because this species of debauchery is more hurtful in a hot than in a cold climate.

It is with reason that the new rum is accused of being more unwholesome than what is old; for, being long kept, it not only becomes weaker and more mellow by part of the spirit exhaling, but time is allowed for the evaporation of a certain nauseous empyreumatic principle which comes over in the distillation, and which is very offensive to the stomach; therefore, though this is the produce of the West-India islands, yet what is supplied there is inferior to that which is brought from England.

It was originally the custom to serve seamen with their allowance of spirits undiluted. The method now in use, of adding water to it, was first introduced by Admiral Vernon in the year 1740, and got the name of grog. This was a great improvement; for the quantity of half a pint, which is the daily legal allowance to each man, will intoxicate most people to a considerable degree, if taken at once in a pure state.

The superiority of wine over spirits in any shape was so conspicuous, that towards the end of the war the fleets in the West Indies and North America were supplied with nothing but wine, and with a success sufficient to encourage the continuance of the same practice in future.

Of Water

As water is a necessary of life, and as the health and comfort of men at sea depend upon its quality, it deserves particular attention.

Spring water is to be preferred to running or stagnated water; for, unless it is taken at the source, or near it, it is apt to be impregnated with decayed vegetable and animal substances, such as leaves, grass, wood, and dead insects. This inconvenience is greatest in a hot climate, where every thing teems with life, and where the materials of putrefaction are both more abundant and more prone to corruption. This is the most pernicious kind of impurity; for the mineral impregnations common in springs are seldom, in any degree, unwholesome, and do not tend, like the other, to make the water corrupt. At many of the West-India watering places the water is found stagnated just above high-water mark; and care should be taken to go higher up to take it where it is running.

The purest water is apt to spoil by producing a putrid glare upon the inner surface of the cask which contains it. There is a great difference in this respect between a new cask, especially if made of moist wood, and that cask which has been hardened and seasoned by age and use. Several contrivances have been proposed for preparing the vessels that hold the water; but none have been found by experience so effectual as letting them stand for some time full of sea water; and it is a great advantage of this method, that it is so easily practicable.

It is in few places we meet with water such as that of Bristol, which, in clean vessels, may be kept for any length of time. We may consider all water kept in wooden vessels as more or less liable to putrefaction; but there is a substance, which is neither rare nor costly, that effectually preserves it sweet. This is quick lime, with which every ship should be provided, in order to put a pint of it into each butt when it is filled. It has the advantage of not being injurious to health; but, on the contrary, is rather friendly to the bowels, tending to prevent and check fluxes. In the year 1779 several ships of the line arrived in the West Indies from England, and they were all afflicted with the flux, except the Stirling Castle, which was the only ship in which quick lime was put into the water. Nor does it spoil the water for any culinary purpose. Its action in preventing putrefaction consists, in part at least, in destroying vegetable and animal life. An addition of putrescent matter is produced in water by the generation of small insects; and the glare that collects on the sides of casks, and also what collects on the surface of the water, is a species of vegetation of the order called by naturalists algæ⁷⁷. Quick lime is a poison to this species of vegetable life as well as to insects: but upon whatever principle it depends, the property of it in preserving water sweet is so well ascertained, that it is inexcusable ever to neglect the use of it.

Quick lime is equally efficacious for this purpose, whether slacked or unslacked; and though the latter form is more convenient for stowage, by having less weight and bulk, yet the other is to be preferred for the sake of safety; for if water should by chance reach the unslacked lime, a great degree of heat is thereby produced, which has been known to give occasion to the most formidable accidents.

The only other objection I know of to the use of quick lime is, that it converts the water into a lime water, rendering it thereby disagreeable to the palate and stomach: but the quantity necessary to preserve it makes but a very weak lime water; for part of the lime is precipitated by the mephitic air, or the aerial acid, as it is otherwise called, of which there is some contained in the water. The accidental exposure to the atmosphere, which also abounds with this sort of air, tends farther to lessen the acrimony of the quick lime⁷⁸.

There are other substances which have been found useful in correcting bad water. Alum and cream of tartar, as antiseptic bodies, have been employed for this purpose. Vinegar and the vegetable acid juices and fruits, such as tamarinds, may be used occasionally to take off the putrid offensive taste which may have arisen in case the use of quick lime has been neglected. In the fleet under Sir Charles Saunders, the water of the river St. Lawrence having been found to produce fluxes, this quality was removed by throwing four pounds of burnt biscuit into each cask before it was used. But there is nothing so effectual, and subject to so few inconveniences, as quick lime.

The next method to be mentioned of purifying water is filtration, which not only separates the gross impurities, but removes the putrid smell and taste. It is performed with a dripping stone, which is a convenient contrivance for officers, but cannot furnish a supply for a whole ship’s company.

When the water of wells or brooks is found loaded with mud, the following expeditious method of filtration, described by Dr. Lind, has been practised with success: – Let a quantity of clean sand or gravel be put into a barrel placed on one end, without the head, so as to fill one half or more of it, and let another barrel, with both ends knocked out, of a much smaller size, (or let it be an open cylinder of any kind) be placed erect in the middle of it, and almost filled with sand or gravel. If the impure water be poured into the small barrel or cylinder, it will rise up through the sand of both barrels, and appear pure above the sand of the large one in the interval between it and the small one.

But when water is offensive in consequence of being long kept, the most effectual and expeditious method of sweetening it is by exposing it to the air in as divided a state as possible. Boiling will not expel the putrid effluvia contained in water; but such is the attraction of air for this offensive matter, that the water need only be thoroughly exposed to it to be rendered quite sweet. This is best done by a machine invented by Mr. Osbridge, a lieutenant of the navy. It consists of a hand pump, which is inserted in a scuttle made at the top of a cask, and by means of it the water, being raised a few feet, falls through several sheets of tin pierced like cullenders, and placed horizontally in a half cylinder of the same metal. The purpose of it is to reduce the water into numberless drops, which being exposed in this form to the open air, is deprived of its offensive quality. The same method will serve to separate the superfluous quick lime in the water. It is a machine very deservedly in common use, and the working of it is a moderate and salutary exercise to men in fair weather.

The following contrivance will be found to afford a sufficient supply of sweet water to particular messes, and may be considered as an artificial and more expeditious sort of dripping stone. – Let the narrow mouth of a large funnel be filled with a bit of sponge, over which let there be a layer of clean gravel or sand covered with a piece of flannel, and over the whole another layer of sand. Muddy or offensive water being poured upon this, runs or drops out clear; and care must be taken to change the sand, sponge, &c. frequently, as they will become loaded with the impurities of the water⁷⁹.

There should be in every ship an apparatus for distilling water in case of distress. This consists merely of a head and worm adapted to the common boiler, and distillation may go on while the victuals are boiling. More than eight gallons of excellent fresh water may be drawn off in an hour from the copper of the smallest ship of war⁸⁰. I refer for a more particular account of all this to the works of Dr. Lind, who was the original inventor and recommender of this method.

This invention seems to have escaped others so long, from the idea that the desideratum in freshening sea water was some substance to be added to it while under distillation. No such substance is necessary, and, the more simple the mode of distillation, the fresher the water will prove.

Rain water at sea is always pure and wholesome, and may be saved occasionally by means of a sail or awning.

CHAP. III.
Of Clothing

Nature has made man so defenceless, that even the rudest nations, in the hottest climates, in general, adopt some sort of covering to guard themselves from the weather. We may affirm, that clothing is the most artificial circumstance in the life of man; and there is none, of which the errors subject him to more inconvenience and hardship. Insensible perspiration is performed by the pores of the skin, and being one of the most important functions of the body, the suppression of it seems to be one of the principal causes, or at least one of the most frequent attendants on feverish and inflammatory complaints; and one of the most common causes of this suppression is the application of cold to the skin.

In order to keep up perspiration, it is necessary that the orifices of the pores of the skin should be bathed, as it were, in the vapour already secreted from them; and clothing seems to act in confining this, as well as in preventing the escape of the natural heat and the access of the external air. Though the air should not be cold, it will check perspiration by carrying off this vapour and drying the skin. In the warmest climates exposure of the skin to the external air is unsafe; for it not only produces a feverish and uneasy sensation at the time, but occasions the most dangerous internal disorders. In consequence of the great sensibility and sympathy of the body, and from the pores of the skin being open in a warm climate, exposure is in some respects even more dangerous than in a cold one. Nothing is more apt to bring on the locked jaw and tetanus than sleeping in the open air; and it was observed in Jamaica, that when it was the custom to wear cotton and linen clothes, the dry belly-ache was much more common than now that it is the custom to wear woollen cloth.

We know besides, that the pores of the skin can absorb not only the moisture that floats in the atmosphere, but a variety of foreign bodies, whether noxious or medicinal, which may be applied to their orifices; and as the air is in certain places loaded with noxious matter, may not clothing be considered as a filter, as it were, to separate the impurities of the air before it comes in contact with the surface of the body?

It is therefore every where of the utmost consequence that sufficient and suitable clothing should be provided.

It would certainly be for the benefit of the service that an uniform should be established for the common men as well as for the officers. This would oblige them at all times to have in their possession a quantity of decent apparel, subject to the inspection of their superiors. It would also be less easy to dispose of their clothes for money without detection, and desertion would also thereby be rendered more difficult.

It is of great consequence that the purser should lay in a sufficient stock of clothing and bedding suited to the climate for which the ship is destined, in order that there may be a sufficient supply after having been on a distant station for a certain length of time. I have known men suffer the greatest inconvenience and hardship, and infectious diseases kept up, from the neglect of this.

The greatest evil connected with clothing is the infection generated by wearing it too long without shifting; for to this cause we have attributed the jail, hospital, or ship fever. The great importance of cleanliness appeared when we were treating of infection, from whence we may judge of what consequence it is that men should be provided with a shift of linen, as that part of the clothing which is in contact with the skin is most likely to harbour infection⁸¹.

As clothing is not the gift of nature, being left to man’s own reason, it is subject to caprice, and thereby productive of inconvenience and disease. The necessity of it depends very much upon habit, like every thing else relating to the human body, and therefore sudden and unseasonable changes of apparel are very unsafe to health. It is also found that a partial exposure of the body is more pernicious than a general exposure. If I were writing for the more delicate part of the world, I should illustrate this by the danger of exposing the feet alone to cold or wet. It is seldom that seamen are susceptible to so great a degree, for their hardy and exposed life steels them against such impressions. But there is another circumstance which renders it of the utmost consequence to defend the feet against external injury. It frequently happens, that, without any visible symptoms of scurvy, the constitutions of seamen are such, that, upon the least scratch being received on the feet or legs, a large spreading incurable ulcer arises; which sometimes ends in the loss of a limb; but at any rate disables them from duty till a cure can be effected by the use of a fresh and vegetable diet, or a change of climate. Next to acute diseases and scurvy, this is the most destructive complaint incident to a sea life, particularly in a hot climate; and I have known great numbers of good men thereby lost to the service. It is, therefore, of the utmost consequence that men should not only be supplied with shoes, but be obliged to wear them, which is found to require a degree of compulsion; for in the West Indies it is observed that seamen always wish to go barefooted.

Since the first edition of this work was published, I have been favoured with several valuable remarks on this subject, by Captain Caldwell, an officer of great humanity and experience. Among other remarks, he observes, that the different articles of clothing supplied to sailors are, in general, too slight, and of too small a size, which renders them expensive and inconvenient to large men. The trowsers, he observes, should be much thicker, and larger, as the least shower goes through them; and, in a cold climate, those made of fear-nought⁸², which do not cost more than the others, should also be allowed. What a situation are men in when topsails are reefing in the winter season while it rains, when cold and wet, with their trowsers sticking to them, (which would not be the case if they were of flannel) and it is not practicable that they should have change of clothing for every time they are obliged to be wet? Thick, double-milled caps are much wanted in bad weather to cover the head and ears. Dutch caps do not keep out the weather, and will not stay on the head. It is commonly remarked that the men who wear the thickest linen shirts are the most healthy.

Men, upon first entering into the service, are allowed the advance of two months wages, in order to provide necessaries: but this, inadequate as it is for a long voyage, is not extended to pressed men. It is also argued against making large stoppages in seamen’s wages; that, by diminishing what they have to receive when paid off, a discouragement is thereby given to the service. But as we see men deserting from men of war when several years wages are due to them, the most reasonable and effectual encouragement seems to be to render their lives as comfortable and healthy as possible.

But why might not most of the articles mentioned be supplied gratuitously? In favour of which Captain Caldwell makes use of an argument frequently inculcated in this work, viz. that so much advantage would accrue to Government by preserving the health and lives of men, and so much would be saved in hospitals, as would much more than reimburse the extraordinary expence⁸³.