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SUMMARY A Study of fifty‐six cases of polymorphic light eruption has shown that the action spectrum frequently lies in both the long ultraviolet wavelengths (320‐400 nm) and the short ultraviolet wavelengths below 320 nm.

The treatment of calcinosis by chelation in two children with dermatomyositis is described. The amount of calcium in skin, muscle and fascia was chemically determined before and after chelation in one child. The amount in fascia was strikingly less after chelation than before chelation, though still elevated. Neither child showed clinical improvement. Treatment of calcinosis with chelating agents might be more effective if the drug were given over more prolonged periods.Es describite le tractamento de calcinosis per chelation in duo casos de dermatomyositis in juveniles. I n un del patientes, le quantitate de calcium in pelle, musculo, e fascia esseva determinate chimicamente ante e post le chelation. Le quantitate de fascia post le chelation esseva frappantemente minus que ante le chelation, sed ill0 esseva ancora elevate in supra del norma. Nulle del duo juveniles monstrava melioration clinic. I1 es possibile que le tractamento de calcinosis con agentes de chelation esserea plus effi cace si le pharmaco esseva administrate plus perdurativemente.