J. $oc. Cosmet. Chem. 29 447 (1978) Oorrigendum Changes in sunburn and mechanisms of protection, by B. E. Johnson. J. $oc. Cosmet. Chem. 29 31-44 (1978). Reference (10) Coblentz, W. Ultraviolet radiation useful for therapeutic purposes: specification of minimum intensity or radiant flux: second communication. J. Am. Med. Assoc. 99 125 (1932) is cited incorrectly for the division of the uv spectrum. Moreover, the wavelength limits for uv-A, uv-B, and uv-C given in the text (p. 32) are not necessarily those universally recognised. It would be better if reference 10 was 'International Lighting Vocabulary, 3rd edn, 4, Publication CIE No. 17 (E-I.1) (1970), Bureau Central de la CIE, Paris'. The spectrum limits would then be uv-A 315-400 nm, uv-B 280-315 nm, uv-C 100-280 nm. 447
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