ANALYSIS OF N-NITROSODIETHANOLAMINE 327 REFERENCES (1) I.E. Rosenberg,J. Gross, T. Spears and U. Caterbone,J. Soc. Cosmet. Chem. 30, 127-135 (1979). (2) P. Rahn and W. Mitchell, Drug Cosmet. Ind. 123 (5), 56-66, 126, & 130 (1978). (3) I.E. Rosenberg, J. Gross, T. Spears and P. Rahn, J. Soc. Cosmet. Chem. 31,237-252 (1979). (4) N. Nitroso Compounds Analysis and Formation, "IARC Scientific Publication No. 14," International Agency for Research in Cancer, Lyons, France, 1972.

EDITORIAL ANNOUNCEMENT Letters to the Editor and Preliminary Communications To encourage more active participation in the Journal of the Society of Cosmetic Chemis.ts, we are initiating a new section entitled "Letters to the Editor," which will commence by the end of 1980. Comments on Journal articles are invited, as well as brief contributions on any aspect of cosmetic or related science that does not warrant the publication of a full-length paper in one of our regular categories (see J.S.C.C. Directions for the Preparation of Manuscripts). Letters may include figures and/or references, but we must emphasize brevity. Readers are also reminded of the Journal's other short category of contribution, the Preliminary Communication, which is intended to provide for rapid dissemination of novel concepts and new findings. Such articles may not exceed four printed pages (approx. 10 double-spaced typed pages) and should otherwise conform to Journal style. Preliminary Communications ard subject to review, but the time for editorial action will not exceed three weeks and the manuscripts will be published ahead of those submitted for regular processing. Copies of Directions for the Preparation of Manuscripts are available from the Editor's office or from the office of the Society of Cosmetic Chemists. Leszek J. Wolfram Editor, J.S.C.C.