Previously published illustrations are usually not accepted. Explanations of figures furnished as legends should not be repeated in the text. Numerical data given in graphs or tables must not be duplicated. As a rule, requests for color reproductions cannot be approved unless the author bears the costs. All figures, whether photographs, graphs, or diagrams, must be mentioned in the text and the top of the figure, the title of the paper, the author's name, and the figure number should be marked lightly on the back in soft pencil.
All figures are to be numbered consecutively throughout and submitted separately.
Whenever possible, several figures should be grouped into a plate on one page. If plates are submitted, the figures must be mounted on regular bond paper, not on cardboard. Please submit high-quality prints. The inscriptions should be clearly legible. Letters 2 mm high are recommended.