Glossy prints should not be retouched, and should be chosen to exclude technical artefacts. Magnification should be indicated by a line representing a defined length included within the photograph. All annotation and lettering should be indicated in the same way, and preferably not included on the original print. Clearly contrasted and focused prints are essential for adequate reproduction. Four originals of all photographs must be submitted.
Photocopies are generally unsuitable for refereeing purposes.
Tables Tables should be as few as possible and should present only essential data. Each must be typed on a separate sheet with a title or caption and clearly numbered. Keywords A list of three to six keywords should be supplied. All unusual abbreviations should be fully explained at their first occurrence in the text. All measurements should be expressed in SI units.