Popular Education

ll permit, it must be, in no small degree, by the improvement-I might say, the redempti

rly related as the body and the soul

quainted with the laws of health, that, by yielding obedience to them, he may improve his physical condition, and most successfully promote his intellectual and moral well-being. I might, then, here refer to some of

but to prevent it entirely is beyond the power of man. Every breath of wind that passes over the surface of the earth, modifies the bodies with which it comes in conta

he universality of its operation. But when we observe shrubs and trees waving in the wind, and animals undergoing violent exertion, year after year, and continuing to increase in size, we may be inclined, on a superficial view, to regard living b

own fruit and seed, speedily to be separated from, and lost to its parent stem; thus causing in a few months an extent of waste many hu

movement can be performed which does not in some degree increase the circulation, and add to the general waste. In this way, during violent exertion, several ounces of the fluids of the body are somet

The vegetable grows, flourishes, and dies, fixed to the same spot of earth from which it sprang. However much external circumstances change around it, it must remain and submit to their influence. At all hours and at all seasons, it is at home, and in direct communication with the soil from which its nourishment is extracted. But it is otherwise with animals: these not only enjoy the privilege of locomotion, but are compelled to use it, and often to go a distance in search of food and shelter. The necessity for a constant change of place being imposed on them, a different arrangement became indispensable for their nutrition. The method which the Creator has provided is not less admirable than simple. To

d against any inconvenience which might otherwise exist, and given to them a guide in relation to both the quality and quantity of food needful for them, and the times of partaking of it, with that beneficence which distinguishes all his works. He has not only provided an effectual safeguard in the sensations of hunger and thirst, but he has attached to their regulated indulgence a degree of pleasure which never fails to insure attention to their demands, and which, in highly-civilized communities, is apt to lead to excessive gratification. Their end is manifestly to proclaim that nourishment is required for the support of the system. When the body is very actively exercised, and a good deal of waste is effected by perspiration and exhalation from the lungs, t

and that the object of nutrition is to repair waste and admi

hey are fitted to constitute a part of the body. In the process of dige

stimulus to the salivary glands, situated in the mouth. By this means, also, the food not only becomes well masticated, but has blended with it a proper amount of saliva, upon both of which conditions the healthy action of the stomach depends. We have here another illustration of the beneficence of the Creator, who has kindly so arranged that the very act of mastication gratifies taste, the mouth being the seat of this sensation. But if

eaches the stomach, it is converted into a soft, pulpy mass, called chyme; and the process by which this change is effected is called chymification. This is the second principal step in digestion, and is effected immediately by the action of the gastric juice. This powerful solvent is secreted by the gastric glands, which are excited to action by the presence of food in the stomach. In health, the gastric secretion always

r hours. Digestion is sometimes effected in less time, as in the case of rice, and pigs' feet soused; but it more commonly

contents that greatly promotes digestion; for by this means every portion of food in turn is brought in contact with the gastric juice as it is discharged from the internal surface

hite color of the contents of these vessels, they have been named lacteals or milk-bearers, from lac, which signifies milk. These lacteals ultimately converge into one trunk, called the thoracic duct, which terminates in the great vein under the clavicle or collar bone, hence called the subclavian vein, just before that vein reaches the right side of the heart. Here the chyle is poured into the general current of the venous blood, and, mingling with it, is exposed to the action of the air in the lungs during respiration. By this process, both the chyle

is soon made to expel it, either upward by the mouth or downward by the bowels. It is in this way, says Dr. Combe, that bile in the stomach excites nausea, and that tartar emetic produces vomiting. The nerves of the bowels, on the other hand, are constituted in relation to digested food; and, consequently, when any

oat, their contents are propelled in a downward direction, somewhat as motion is propagated from one end of a worm to the other. It has hence been called vermicular, or wormlike motion. Some medicines have the power of inverting the order of the muscular contractions. Emetics operate in this manner to produce vomiting. Other medicines, again, excite the natural action to a higher degree, and induce a cathartic action of the bo

On the other hand, bowel complaints are frequently produced by a chill on the surface. The mucous coat and the skin are both charged with the double function of excretion and absorption. By the exercise of the former function, much of the waste matter of the system, requiring to be removed, is thrown into the

e intestinal canal. In its course its bulk is considerably increased by the excretion of waste matter which has served its purposes in the system, and which, mingling with the innutritious and refuse part of the food, is thrown out of the body in the form of excrement. If the co

tant but gentle agitation which the whole digestive apparatus receives during the act of breathing, and from exercise of every description. By free and deep inhalations of air into the lungs, the diaphragm is depressed and the bowels are pushed down. But when the air is thrown out from the lungs, the diaphragm rises into the chest, and the bowels follow, being pressed upward by the contractile power of the abdominal muscles. During exercise, breathing is deeper and more free, which gives additional pressure to the bowels from above. The abdominal muscular contraction is also, in turn, more vigorous and extensive, and thus the motion is returned from below. Persons that take little or no exercise, or who allow the chest and bowels to be confined by tight clothing, lose t

the vigorous performance of its function. As a general rule, then, five or six hours should elapse between meals. If the mode of life is indolent, a greater time is required; if active, less time will suffice. Where the usages of society will allow the principal meal to be taken near the middle of the day, the following time for meals is approved by physiologists generally: breakfast at 7 o'clock, dinner at half past 12, and tea at 6. Luncheons and late suppers should be avoided; for the former will always be found to interfere with the healthfu

exhalation. When the body is overheated by exercise, a copious sweat breaks out, which, by evaporation, carries off the excess of heat, and produces an agreeable feeling of coolness and refreshment. The sagacity of Franklin led him to the first discovery of the use of perspiration in reducing the heat of the body, and to point out the analogy subsisting between this process and that of the evaporation of water from a rough porous surface, so constantly resorted to in the East and West Indies, and in other warm countries, as an efficacious means of reducing the temperature of the air in rooms, and of wine and other drinks, much below that of the surrounding atmosphere. This is the higher and more obvious degree of the function

closing the space in the neck about the arm with a handkerchief. After the lapse of a few minutes, it will be seen, by drawing the fingers across the inside of the jar, that the insensible perspiration even from the hand is very considerable. Many attempts have been made to estimate accurately the amo

twenty to forty ounces pass off through the skin of an adult in usual health every twenty-four hours. Take the lowest estimate, and we find the skin charged with the removal of twenty ounces of waste matter from the system every day. We can thus see ample reason why checked perspiration proves so detrimental to health; for every twenty-four hours during which such a state continues, we must either have this amount of useless and hurtful matter accumulating in the system, or some of the other organs of excretion mu

an those which are sound. Thus, in one instance, checked perspiration may produce a bowel complaint, and in another, inflammation of the lungs, and so on. Hence the fitness, in prescribing remedies, of adapting them not only to the disease itself, but of taking into the account the cause of the disease. A bowel complaint, for example, may arise either from overeating or from a check to perspiration. The thing to be cured is th

f the skin, where it is acted upon, and in a short time taken into the system by the absorbent vessels. In like manner, when the perspiration is brought to the surface of the skin, and confined there, either by injudicious clothing or by want of cleanliness, there is much reason to believe that its residual parts are again ab

t bathe the entire person once a month, or once a year even! When the residual parts of the perspiration are not removed by washing or bathing, they at last obstruct the pores and irritate the skin. It is apparently for this reason that, in the Eastern and warmer countries, where perspiration is very copious, ablution and bathing have assumed the rank and importance of religious observances. Those who are in the habit of using the flesh-brush daily are at first surprised at the quantity of white dry scurf which it brings off; and those who take a warm bath for half an hour at long intervals can not have failed to notice the great amount of impurities which it removes, and the grateful feeling of com

being removed, let the head, face, and neck be washed as usual, and thoroughly dried by the use of a towel. Proceed to wash the chest and abdomen, which may be dried as before, after which a coarse towel or a flesh-brush should be vigorously applied, until the skin is perfectly dry, and there is a pleasant glow upon the surface. The back and limbs, in turn, should be washed, dried, and excited to a healthy and pleasant glow by friction. This last is of the utmost importance. If not easily secured, salt or vin

it is required that "physiology and hygiene shall hereafter be taught in the schools of

composed of several hundred youth of both sexes, have been radically changed; and the practice of daily ablution has ceased to be the luxury of the few, having become the necessity not only of teachers and scho

d excites the skin, rendered more sensitive by the perspiration during the night, to renewed activity. Cold ablutions, he adds, are fitted for all constitutions; they are best adapted for purifying and strengthening the body; for women, weak subjects, children, and old age. The room in which the ablution is performed may be slightly heated for debili

used it much and successfully for the express purpose of diminishing such liability, both in himself and in others in whom the chest is delicate. In his own instance, in particular, he is conscious of having derived much advantage from its regular employment, especially in

o keep up the action of the skin by the above means, and to avoid strong and exciting causes, will ever suffer from colds, sore throats, or similar complaints; while, as a means of restoring health, they are often incalculably serviceable. If one tenth of the persevering attention and labor bestowed to so much purpose in rubbing down and currying the skins of horses were bestowed by the human race in keeping themselves in good condition, and a little attention were paid to diet and clothing, colds, nervous disea

but to remark simply upon the necessity of changing clothes often, or at least of ventilating them frequently. This remark applies particularly to all articles of clothing worn next to the skin, and to beds. Clothes worn next to the skin during the day should be removed on going to bed, and a fresh sleeping-gown should be put on. The former should be hung up in a situation that will allow the accumulated perspiration of the day to pass off by evaporation. By this means they will become sufficiently freshened and ventilated, by morning, to be worn another day, when the night-clothes, in turn, should be ventilated. Beds also should be thrown open and exposed to fresh air with open doors, or at least windows, several hours before being made. In our best-regu

hould be cleaned with a brush and water. A tooth-pick will sometimes be found necessary in the removal of particles of food that are inaccessible to the brush. Metallic tooth-picks injure the enamel, and should not be used. Those made of ivory, or the common goose-quill, are unobjectionable. The brush should be used, not only after each meal, but the last thing at night and the first thing in the morning. This will prevent the accumulation of tartar, which so commonly incrusts neglected teeth. If suffered to remain, it gradually accumulates, presses upon the gums, and destroys their health. B

ose who are willing to pander to the diseased appetites of their patients. But there is the best medical testimony that the use of this filthy weed "debilitates the vessels of the gums, turns the teeth yellow, and renders the appearance of the mouth disagreeable." Dr. Rush informs us that he knew a man in Philadelphia who lost all his teeth by smoking. In speaking of the moral effects of this practice, he adds, "Smoking and chewing tobacco, by rendering water and other simple liquors insipid to the taste, dispose very much to the stronger stimulus of ardent spirits; hence t

h, and is a condition upon which their health, and the healthy exercise of the function of digestion, alike depend. If from any cause the teeth of one jaw are removed, the corresponding teeth of the other jaw, being thus deprived of that exercise which is essential to their health, are pressed out of the jaw, appear to grow long, becom

nd earthy elements of which the bones are composed vary at different ages. In childhood and early youth, when but little strength is needed, and great growth of bone is required, the animal part preponderates. As growth advances the animal part decreases, and the earthy part increases. In middle l

titudes of children in our country, from this and kindred causes, fail of attaining the size of their ancestors. These remarks may be turned to a practical account in the family and in the school. At birth, many of the bones are scarcely more than cartilage; yet children are frequently urged to stand and walk long before the bones become sufficiently strong to sustain the pressure; and, as a consequence, their legs become crooked, and they are perhaps other ways deformed for life. Children ought always, when seated, to be able to rest their

even the physically crooked may be made straight; the chest may be enlarged, the general health may be improved, and much may be done in many ways to fortify those who have inherited feeble constitutions against the attacks of disease. The benefits resulting from maintaining an upright form, and a free and open chest, have already been considered, and I shall have occasion to refer to them again. The chest of most adults, although inc

its more constant use and elevation. A physician, highly celebrated for the success that has attended his treatment for lung affections, after dwelling upon the injury to the health that frequently results from sitting at too low desks, remarks, that "every parent should go to the school-rooms, and know for a certainty that the desks at which his children write or study are fully up to the arm-pits, and in no case allow them to sit stooping, or leaning the shoulders forward on the chest. If fatigued by this posture, they should be called to stand, or go out of doors and run about." The height of table I find most conducive to comfort for my own use is midway between the two; that is, half way from the elbow (as the arm hangs by the side) to the arm-pit. It is necessary, however, to rest both arms equally upon the table. The secret of po

ive young females, of the earliest age, the habit of holding back the shoulders, and thus expanding the chest. From the observations of anatomists lately made, it appears that the clavicle or collar bone is actually longer in females of the French nation than in those of the English. As the two nations are of the same race, as there is no remarkable difference in their bones, and this is peculiar to the sex,

it is attached. This any one can see illustrated in bending the arm. The muscle which performs this function lies between the elbow and the shoulder. It is attached to the shoulder by its origin, and to one of the bones of the fore-arm, just below the elbow, by its insertion. By grasping the arm midway between the shoulder and the elbow with the opposite hand, and then bending the arm, the enlargement of the belly of the muscle by the contraction will be at once perceived. Then, by moving the hand down on the inside of the arm toward the elbow, the lessening muscle may be readily traced until it terminates in a tendon, of much less size than the muscle, but of great strength, which is inserted into the bone just below the elbow. As the fore-arm is drawn up, and especially if there be a weight in the hand, the tendon may be felt just wi

nded upon the will, as does the action of the muscles of locomotion, the circulation of the blood and the process of breathing would cease, and life would become extinct whenever sleep or any other cause should overcome the attention. Here, then,

hould be regulated, and can scarcely fail to excite the attention of the general reader, and

ve to the well-being of many other important functions. By muscular contraction, the blood is gently assisted in its course through the smaller vessels to the more distant parts of the body; and by it the important processes of digestion, respiration, secretion, absorption, and nutrition are promo

a muscle is called into frequent use, its fibers increase in thickness within certain limits, and become capable of acting with gr

invalid or delicate person it will be likely to prove detrimental. In order to prove beneficial, exercise must be resorted to only when the system is sufficiently vigorous to be able to meet it. This is usually the case after a lapse of from two to four hours after a moderate meal. The forenoon, then, will generally be found the best time for exercise for persons whose habits are sedentary. If exercise be delayed till the system feels exhaustion f

w in physiology, that energetic action can not be kept up in two distant parts of the system at the same time. Hence, whenever a meal is taken immediately after vigorous exercise, the stomach is taken at d

meal. A mere stroll, which requires no exertion and does not fatigue, will not be injurious before or after eating; but exercise beyond this limit is at such times hurtful. All, therefore, who would preserve and improve their health, will find it to their advantage to observe faithfully this important law, otherwise they will deprive themselves of most of the benefits that are usually attendant upon judicious exercise. All, then, who are forced to much exertion immediately after eating, should satisfy themselves with partaking of a v

till. To require a child to extend his arm and hold a book in his hand, or even to keep the arm extended but a short time, is a violation of this law which should never be permitted. Akin to this is the very injudicious practice, which is sometimes resorted to in schools, of requiring a boy to

encouraged frequently to change their position. I fully concur in the opinion expressed by Dr. Caldwell, who says, "It would be infinitely wiser and better to employ suitable persons to superintend the exercises and amusements of children under seven years of age, in th

ially to strengthen those that are weak. It ought hence to be frequently varied, and always adapted to the peculiarities of individuals. Different kinds of exercise will therefore

y result from it, but its beneficial effects would be greatly increased if the same amount of exercise were taken every day at the same hours. Give the system an opportunity of establishing good habits in this respect, and it will derive great advantage from them; but it is difficult for it to derive any benefit

ne with them free movements of the upper part of the body, are doubly advantageous, for they not only exercise the muscles of the whole body, but possess the additional advantage of animating the mind and increasing the nervous stimulus, by which exercise is rendered easy, pleasant, and invigorating. For the purpose of developing the chest, physiologists generally concur in recommending fencing as a good exercise for boys. Shuttlecock is a very beneficial exercise for females, calling into play, as it does, the muscles of the chest, trunk, and arms. It ought to be practice

ragm and abdominal muscles are in constant action, and communicate to the stomach and bowels a healthy and agreeable stimulus. Where the voice is raised and the elocution is rapid, the muscular effort becomes fatiguing; but when care is taken not

, and quiet sorrow by the united assistance of the sound and sentiment of a properly chosen song, it has a still more direct and important effect. 'I here introduce a fact,' he remarks, 'which has been suggested to me by my profession, and that is, that the exercise of the organs of the breast by singing contributes very much to defend them from those diseases to which the climate and other causes expose them. The Germans are seldom afflicted with consumption, nor have I ever known but one instance

ercise. If a lodging-room has been properly ventilated by leaving open windows, or otherwise, so that the air is pure and healthful in the morning, ten or fifteen minutes spent in bathing and friction, with a

cises are those which combine the free play of all the muscles of the bo