Headings should be set out clearly but not underlined. 2.b., etc., and tertiary headings 2. a.1., 2.a.2. No cross-references should be given by page number, but 'above' and 'below' should be used with the section specified, e.g. Section 2.a.2. The SI system of units should be used. The author should mark in the margin of the manuscript where figures and tables may be inserted.
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Use ' et al .' in the text only when there are four or more authors. These contributions will be dealt with by a streamlined schedule and should appear within six months from receipt. To meet this schedule, authors will be required to make revisions with minimal delay. Discussions of papers which have already appeared in the Magazine are welcomed, subject to the four-page limit. Tables should be typed with double-line spacing on sheets separate from the running text.