Illumination items: By the lighting and illumination committee: Plotting of spectrophotometric data

During recent years the value of presenting data by a plotted line has been recognized in all branches of industry. However, in all cases where data are so presented, there are none where graphical representation is more useful than in spectrophotemetry. In presenting such data, each author has usually used his own methods in plotting and a lack of uniformity has been the result. The material in this paper has been compiled with a view to presenting some of the details in plotting spectrophotometric curves which will aid in establishing a uniformity of practise.