DIRECTIONS FOR PRF•PARATION OF MANUSCRIPTS 459 7. REFERENCES The names of all the authors of papers to be cited should be given when reference is first made in the text. In cases where there are more than two authors subsequent citations should give the first-named author followed by the words et al underlined once. References should be indicated in the text by bracketed numbers, and the full reference should be given at the end of the paper in the following form. 7.1. Journals. It is essential that the authors' names and initials, the abbreviated title of the journal, the volume number, the page number, the month and year of publication should be given. Abbreviations of journals should be in accordance with the practice followed by Chemical Abstracts (cf. list of periodicals, abstracted by Chemical Abstracts). If access to that publication is not available then the name of the journal should be given in full. 7.2. Books. It is essential that the authors' names and initials, the full title of the book, the page number, the year of publication, the name and address of publishers should be given. 7.3. Patents. Only the patent number should be cited, e.g. Brit. Pat. 805,202. 7.4. Please note that in the typewritten manuscript 7.4.1. the abbreviated or full title of the journal, or the title of the pub- lished book, should be underlined once 7.4.2. the volume of the journal should be underlined by a wavy hne 7.4.3. the month of publication, the year of publication, and the publisher in the case of books, should be bracketed independently of each other, e.g. (1) Fregert, S. Acta Dermato-Venereol. 40 206 (July) (1960). (2) Baer, R. L. in McKenna, R. M. B. Modern trends in dermatology 232 (1954) (Butterworths, London). If references are likely to be accessible only with difficulty, the inclusion of a suitable abstract reference is also desirable. 8. UNITS OF MEASUREMENT Only SI units may be used [see J. 19 449 (1968)1.

460 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS 9. TRADE NAMES All trade names cited in the text should be underlined oncc. I O. ACKNOWLEDGEIVIENTS Acknowledgements for permission to reproduce illustrations, photo- graphs, graphs, etc., should be listed at the end of the text. Acknowledge- ment to the author(s)' employers for permission to publish should not be made, because publication is deemed to indicate that such permission has been granted. II. PROOFS Page proofs will be sent to the first-named author for correction. In the interest of speedy publication galley proofs are no longer submitted to authors. The difficulty and expense involved in making corrections to page proofs makes it essential for authors to prepare their manuscripts carefully so that alteration is not required. 12. REPRINTS AND PREPRINTS The first-named author will automatically receive 25 reprints, or pre- prints where applicable, free of charge. Additional reprints must be ordered at the time the proofs are returned. June 1968