THE THREE GRACES OF HEALTH PURE FOOD PURE AIR PURE WATER A SUFFICIENCY OF PURE FOOD PURE AIR PURE WATER WOULD ADD AT ONCE TO THE AVERAGE OF NEGRO LIVES INCREASE LENGTH OF LIFE IN A CENTURY 17th and 18th 4 YEARS FIRST HALF 19th 9 YEARS LAST HALF 17 YEARS 20th GERMANY 27 YEARS DURATION LIFE IN INDIA 25 YEARS MASSACHUSETTS 45 YEARS DENMARK SWEDEN 50 YEARS |