is ascertained by experiments that breathing bad air tends so to reduce all the processes of the body, that less oxygen is demanded and less carbonic acid sent out. This, of course, lessens the vitality and weakens the constitution; and it accounts for the fact that a person of full health, accustomed to pure air, suffers from bad air far more than those who are accustomed to it. The body of strong and healthy persons demands more oxygen, and throws off more carbonic acid, and is distressed when the supply fails. But the one reduced by bad air feels little inconvenience, because all the functions of life are so slow that less oxygen is needed, and less carbonic acid thrown out. And the sensibilities being deadened, the evil is not felt. This provision of nature prolongs many lives, though it turns vigorous constitutions into feeble ones. Were it not for this change in the constitution, thousands in badly ventilated rooms and houses would come to a speedy death.
One of the results of unventilated rooms is scrofula, A distinguished French physician, M. Baudeloque, states that:
"The repeated respiration of the same atmosphere is the cause of scrofula. If there be entirely pure air, there may be bad food, bad clothing, and want of personal cleanliness, but scrofulous disease can not exist. This disease never attacks persons who pass their lives in the open air, and always manifests itself when they abide in air which is unrenewed. Invariably it will be found that a truly scrofulous disease is caused by vitiated air; and it is not necessary that there should be a prolonged stay in such an atmosphere. Often, several hours each day is sufficient. Thus persons may live in the most healthy country, pass most of the day in the open air, and yet become scrofulous by sleeping in a close room where the air is not renewed. This is the case with many shepherds who pass their nights in small huts with no opening but a door closed tight at night."
The same writer illustrates this, by the history of a French village where the inhabitants all slept in close, unventilated houses. Nearly all were seized with scrofula, and many families became wholly extinct, their last members dying "rotten with scrofula." A fire destroyed a large part of this village. Houses were then built to secure pure air, and scrofula disappeared from the part thus rebuilt.
We are informed by medical writers that defective ventilation is one great cause of diseased joints, as well as of diseases of the eyes, ears, and skin.
Foul air is the leading cause of tubercular and scrofulous consumption, so very common in our country. Dr, Guy, in his examination before public health commissioners in Great Britain, says: "Deficient ventilation I believe to be more fatal than all other causes put together." He states that consumption is twice as common among tradesmen as among the gentry, owing to the bad ventilation of their stores and dwellings.
Dr. Griscom, in his work on Uses and Abuses of Air, says:
"Food carried from the stomach to the blood can not become nutritive till it is properly oxygenated in the lungs; so that a small quantity of food, even if less wholesome, may be made nutritive by pure air as it passes through the lungs. But the best of food can not be changed into nutritive blood till it is vitalized by pure air in the lungs."
And again:
"To those who have the care and instruction of the rising generation—the future fathers and mothers of men—this subject of ventilation commends itself with an interest surpassing every other. Nothing can more convincingly establish the belief in the existence of something vitally wrong in the habits and circumstances of civilized life than the appalling fact that one fourth of all who are born die before reaching the fifth year, and one half the deaths of mankind occur under the twentieth year. Let those who have these things in charge answer to their own consciences how they discharge their duty in supplying to the young a pure atmosphere, which is the first requisite for healthy bodies and sound minds."
On the subject of infant mortality the experience of savages should teach the more civilized. Professor Brewer, who traveled extensively among the Indians of our western territories, states: "I have rarely seen a sick boy among the Indians." Catlin, the painter, who resided and traveled so much among these people, states that infant mortality is very small among them, the reason, of course, being abundant exercise and pure air.
Dr. Dio Lewis, whose labors in the cause of health are well known, in his very useful work, Weak Lungs and How to Make them Strong, says:
"As a medical man I have visited thousands of sickrooms, and have not found in one in a hundred of them a pure atmosphere. I have often returned from church doubting whether I had not committed a sin in exposing myself so long to its poisonous air. There are in our great cities churches costing $50,000, in the construction of which, not fifty cents were expended in providing means for ventilation. Ten thousand dollars for ornament, but not ten cents for pure air!
"Unventilated parlors, with gas-burners, (each consuming as much oxygen as several men,) made as tight as possible, and a party of ladies and gentlemen spending half the night in them! In 1861, I visited a legislative hall, the legislature being in session. I remained half an hour in the most impure air I ever breathed. Our school-houses are, some of them, so vile in this respect, that I would prefer to have my son remain in utter ignorance of books rather than to breathe, six hours every day, such a poisonous atmosphere. Theatres and concert-rooms are so foul that only reckless people continue to visit them. Twelve hours in a railway-car exhausts one, not by the journeying, but because of the devitalized air. While crossing the ocean in a Cunard steamer, I was amazed that men who knew enough to construct such ships did not know enough to furnish air to the passengers. The distress of sea-sickness is greatly intensified by the sickening air of the ship. Were carbonic acid only black, what a contrast there would be between our hotels in their elaborate ornament!"
"Some time since I visited an establishment where one hundred and fifty girls, in a single room, were engaged in needle-work. Pale-faced, and with low vitality and feeble circulation, they were unconscious that they were breathing air that at once produced in me dizziness and a sense of suffocation. If I had remained a week with, them, I should, by reduced vitality, have become unconscious of the vileness of the air!"
There is a prevailing prejudice against night air as unhealthful to be admitted into sleeping-rooms, which is owing wholly to sheer ignorance. In the night every body necessarily breathes night air and no other. When admitted from without into a sleeping-room it is colder, and therefore heavier, than the air within, so it sinks to the bottom of the room and forces out an equal quantity of the impure air, warmed and vitiated by passing through the lungs of inmates. Thus the question is, Shall we shut up a chamber and breathe night air vitiated with carbonic acid or night air that is pure? The only real difficulty about night air is, that usually it is damper, and therefore colder and more likely to chill. This is easily prevented by sufficient bed-clothing.
One other very prevalent mistake is found even in books written by learned men. It is often thought that carbonic acid, being heavier than common air, sinks to the floor of sleeping-rooms, so that the low trundle-beds for children should not be used. This is all a mistake; for, as a fact, in close sleeping-rooms the purest air is below and the most impure above. It is true that carbonic acid is heavier than common air, when pure; but this it rarely is except in chemical experiments. It is the property of all gases, as well as of the two (oxygen and nitrogen) composing the atmosphere, that when brought together they always are entirely mixed, each being equally diffused exactly as it would be if alone. Thus the carbonic acid from the skin and lungs, being warmed in the body, rises as does the common air, with which it mixes, toward the top of a room; so that usually there is more carbonic acid at the top than at the bottom of a room. [Footnote: Prof. Brewer, of the Tale Scientific School, says: "As a fact, often demonstrated by analysis, there is generally more carbonic acid near the ceiling than near the floor."] Both common air and carbonic acid expand and become lighter in the same proportions; that is, for every degree of added heat they expand at the rate of ¼80 of their bulk.
Here,
