Measurements of length, height, weight, and volumes should be reported in the metric system or their decimal multiples. Blood pressures should be given in millimeters of mercury, temperatures in degrees Celsius. Illustrations must be restricted to the minimum needed to clarify the text. Previously published illustrations are usually not accepted. All figures, whether photographs, graphs, or diagrams, must be mentioned in the text and marked lightly in soft pencil on the back to indicate the top of the figure, the author's name, and the figure number.
All figures are to be numbered consecutively throughout and submitted separately.
Good-quality glossy prints should be submitted in the desired final size. The inscriptions should be clearly legible. Letters 2 mm high are recommended. Well-contrasted photographic prints should be submitted that are trimmed at right angles and in the desired final size. Inscriptions should be about 3 mm high.