B. G. Jefferis and J. L. Nichols, Searchlights on Health — Menstruation (1919)
“ THE BOUNDARY-LINE.—Menstruation—"the periods"—the appearance of the catamenia or the menses—is then one of the most important epochs in a girl's life. It is the boundary-line, the landmark between childhood and womanhood; it is the threshold, so to speak, of a woman's life. Her body now develops and expands, and her mental capacity enlarges and improves. ”
