326 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS ing, wool processing, and finishing, possi- bly as a reminder to the laboratory scien- tist that his work may have practical application. This book is an excellent introduction for an organic chemist entering the field of wool or hair chemistry, and a valuable refresher and reference source for those already working in it.--JOHN MEN- KART--Clairol Incorporated. ERRATUM Isolation of melanin pigments from human hair j. c. ARNAUD and P. BOR•, L'Oreal Research Laboratories, Societe L'Oreal, 1 Avenue de Saint Germain, Boite Postale no. 22, 93601 Aulnay-sous-bois, France. J. Soc. Cosmet. Chem., 32, 137-152 (May/June 1981) 1. P. 137, Synopsis, line 4: Replace the word "PROTOLYTIC" with "PROTEOLYT- IC." 2. P. 139, line 12: Following the sentence ending" .. the hydrolysis period." insert "An internal tube rack was connected to the external electric motor and the sealed tubes rotated at 36 rpm." 3. P. 143, Table VI: The amino acid values given in the table should be increased by a factor of ten, thus, the value for Aspartic Acid should read 110mM instead of 11 Threonine should read 81 instead of 8.1 etc. 4. P. 144, line 14: Replace the phrase "At E/S • 1.5,.. "by "At the maximum of the digestion curve,..."

326 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS ing, wool processing, and finishing, possi- bly as a reminder to the laboratory scien- tist that his work may have practical application. This book is an excellent introduction for an organic chemist entering the field of wool or hair chemistry, and a valuable refresher and reference source for those already working in it.--JOHN MEN- KART--Clairol Incorporated. ERRATUM Isolation of melanin pigments from human hair j. c. ARNAUD and P. BOR•, L'Oreal Research Laboratories, Societe L'Oreal, 1 Avenue de Saint Germain, Boite Postale no. 22, 93601 Aulnay-sous-bois, France. J. Soc. Cosmet. Chem., 32, 137-152 (May/June 1981) 1. P. 137, Synopsis, line 4: Replace the word "PROTOLYTIC" with "PROTEOLYT- IC." 2. P. 139, line 12: Following the sentence ending" .. the hydrolysis period." insert "An internal tube rack was connected to the external electric motor and the sealed tubes rotated at 36 rpm." 3. P. 143, Table VI: The amino acid values given in the table should be increased by a factor of ten, thus, the value for Aspartic Acid should read 110mM instead of 11 Threonine should read 81 instead of 8.1 etc. 4. P. 144, line 14: Replace the phrase "At E/S • 1.5,.. "by "At the maximum of the digestion curve,..."