A Manual of Experiments in Elementary Science: Student's Edition
A 1918 student's laboratory manual of elementary science experiments, written by Francis D. Curtis and published by Charles E. Merrill Company for school pupils. The single picture is a full-page grid diagram from a model experiment, with a labelled box drawn in oblique projection across squared paper. A designer might take its fine graph-paper grid, numbered axes and hand-lettered label as a plain, technical schematic motif.
