Summary.It is shown by about 400 determinations of the capillary resistance carried out in May—July, 1936, by stasis‐test on normal children under one year of age,1) that newly born children have an extraordinary capillary resistance for their first five days, regardless whether they are prematurely born,2) that the resistance of about half the healthy children, aged 1—5 months, fed exclusively on mother's milk, is lowered,3) that the capillary resistance of about 10% of the 6—12 months old children on mixed diet is lowered.Ascorbic (cevitamic) acid was administered to 8 diseased children, whereupon the resistance of 3 became normal. The lowered capillary resistance of 6 out of 10 healthy children became normal after the administration of tomato juice.Too little vitamin C is certainly a frequent cause of lowered capillary resistance in otherwise he