Need Of Covering During Sleep

The reason ït is necessary to be well covered while sleeping is that when the body lies down it is the intention of nature that it should rest, and the heart especially should be relieved of its regular work teinporarily. So that organ makes ten strokes a minute less than when the body is in an upriglit posture. This means 600 strokes in 60 minutes. Therefore in the eight hours that a man usually spends in taking his night's rest the heart is saved nearly 5, 000 strokes. As it pumps six ounces of blood with each stroke, it lifts 30,000 ounces less of blood in this night's session than it WO'jld during the day, when a man is ■usually in an upright position. Now, the body is dependent f or its warmth on the vigor of the circulation, and as the blood flows so much more slowly through the veins when one is lying down the warmth lost in the reduced circulation must be supplied by extra coverings. -