“…Quite frequently chronic blood loss or dietetic inadequacy are believed to be aetiological factors. Heath (1933) Widdowson:and McCance, 1936Davidson and Fullerton, 1933Reznikoff et al, 1934Marlow and Taylor, 1934 Wright, 1934 Henrique andRoland, 1928 Baldridge, 1935;Gillett et al, 1918;Ohlson andDaum, 1935 White House Conference, 1932 Fullerton, 1936 * 5 litres of blood, 13.8 grammes haemoglobin per cent., 0.335 grammo iron per cent. in haemoglobin.…”