General health

PREGNANCY AND CHILDBIRTH

Conception, the act of becoming pregnant, has all the ingredients of a most exciting drama, carried out on a microscopic scale. In coitus (sexual intercourse), a healthy man releases about a tea-spoonful of semen into the vagina of his mate. This semen contains from 300 to 400 million spermatozoa, or male germ-cells, also called sperm. [...]

HEALTH AND VACATIONS: SUNBURN AND SUNTAN

Sunshine is healthful for most people; it makes them feel and look better. However, it is almost surely harmful to people suffering from certain diseases. These include tuberculosis of the lungs, nephritis, and particular skin diseases such as lupus erythematosus. However, psoriasis and some other diseases are helped by sunlight. To avoid a burn that [...]

CARE OF THE BODY’S INDIVIDUAL PARTS: EYESTRAIN

You can best treat eyestrain by putting an end to the conditions that are causing it. Improper lighting, especially when reading or doing other close work, is a frequent cause of eyestrain. Do not face the light; it should come from behind and from the side, so you will not be in your own shadow. [...]