I do not wonder that Blake, Jackson, and many others have advised an out-door life of the wildest and most exposed sort, to invalids of this class,—but I do wonder that they have not equally insisted upon abundance of air for them, as pure as that of the fields and mountains, in their own homes, and in the midst of friends and comforts.
MOISTURE IN THE ATMOSPHERE.
It is the common belief that a dry atmosphere is most favorable to the consumptive. Many medical authors have advanced this assumption. It is, nevertheless, an error. In the British Isles and in France, outside the cities and manufactories, the mortality from pulmonary diseases is much less than among the agricultural classes of this country. And on the western shores of this continent consumption is comparatively unknown.
Our disadvantage in this comparison is attributable, in considerable part, to the lack of humidity in our atmosphere. Without the evidence of facts, we might, a priori, argue, that excessive dryness of the air would produce dryness and irritability of the air-passages. From time immemorial, watery vapor has been used as a remedy in irritation and inflammation of the respiratory organs.
A hundred times have my consumptive patients expressed surprise that the wet weather, in which I have insisted they should go out as usual, has not injured them,—that they even breathe more freely than on pleasant days. Of course, I tell them, if the body is well protected, the more moist the air, the more grateful to your lungs.
There is no possible weather which can excuse the consumptive for keeping in-doors. Give him sufficient clothing, protect his feet carefully, and he may go out freely in rain, sleet, snow, and wind. Ignorance of this fact has killed thousands.
That point of temperature at which the moisture of the air first becomes visible is known as the dew-point. According to one authority, the mean dew-point of England, from the first of November to the last of March, is about 35°; that of our Northern States about 16°. Now suppose a house in England is kept at a temperature of 70°, the drying power would there be represented by 35. A house with the same temperature in Albany, for example, would possess a drying power of 54. This great contrast in the atmosphere of the two countries is strikingly illustrated by the difference between the plump body and smooth skin of the Englishman, and the lean, juiceless body, and dry, cracked skin of the Yankee. It is also shown by the well-known difference in the influence of house-heat upon furniture. Our chairs and sofas and wood-work warp and shrink, while nothing of the sort occurs in England.
As we cannot increase the amount of moisture in the atmosphere of our continent, we must limit our practical efforts to the air of our houses. If we use a stove, its entire-upper surface may be made a reservoir for water; ornamental work, of but little cost, may be used to conceal it. The furnace may be made to send up, with its heat, many gallons of water daily, in the form of vapor. In justice to stoves and furnaces, I must say here, that, in the opportunity to do this, they possess one advantage over open fire-places.
By adding artificial moisture in this way to the air of our houses, we not only save our furniture from drying and shrinking, but protect our skin, eyes, nose, throat, and lungs from undue dryness, and from the affections to which it would give rise. It is found necessary, in our cloth-manufactories, to maintain a moist atmosphere in order to successful spinning. Intelligent managers have assured me that coughs and throat difficulties are comparatively rare in the spinning department.
We must all have observed, that, while the air of a hot kitchen is comfortable, that of a parlor at the same heat, from an air-tight stove, is almost suffocating. The kitchen has a hot stove, but the steam of its boiling kettles moistens the air.