Roosevelt Standard | 1938-12-08 | Page 14 | Blood in Four Categories

blood in four Cate categories gorles the blood of human beings is typed in lour four different categories generally represented by the first tour four roman numerals experimentation in blood transfusion years ago brought out that bloods ol of different dil lerent species of animals were incompatible and that a similar incompatibility existed in all races of men between bloods of different individuals of the tour four main types ot of blood often referred to as blood groups so far as is definitely known no one type is any better than another says the united states pub he health service