6. Violent anger may cause death by stopping the beating of the heart.
7. Alcohol injures the blood.
8. Alcohol overworks the heart.
9. Alcohol enlarges the blood-vessels.
10. Tobacco injures the blood.
11. Tobacco weakens the heart and makes the pulse irregular.
12. The use of strong tea and coffee causes palpitation of the heart.
13. A cold is caused by a disturbance of the circulation. A cold should never be neglected.
14. When an artery is wounded, the blood is bright red and flows in spurts.
15. When a vein is wounded, the blood is purple and flows in a steady stream.