Good Health and How We Won It

The new ideas of living which are the subject of this book have proceeded from investigation of the human body with the high-power microscope. The discoveries made, which have to do, not so much with the body itself as with the countless billions of minute organisms which inhabit the body, may be best set forth by a description of the blood. “The blood is the life,” says Exodus, and modern science has confirmed this statement. From the blood proceeds the life of all the body, and in its health is the body’s health.

If you should prick your finger and extract a drop of your own blood, and examine it under a microscope, you would make the fascinating discovery that it is the home of living creatures, each having a separate and independent existence of its own. In a single ounce of blood there are more of these organisms than there are human beings upon the face of the globe. These organisms are of many kinds, but they divide themselves into two main groups, known as the red corpuscles and the white.