This advertisement will appear in May Popular and Women's Weeklies, and June Monthlies. IT has been found that there are certain foods which, eaten regularly, help you to fight fatigue. They are "Nature's tonics"— the foods rich in Vitamin C and Vitamin B1. So don't let unusual work or conditions get you down—just make sure you include in your meals extra quantities of these foods. Here they are : FOR VITAMIN C. Potatoes — plenty of potatoes — green vegetables and salad greens. Half a pound of potatoes, plus about 4 oz.