The Virtue of Education

http://books.google.com/books?id=9OUvAAAAMAAJ&source=gbs_navlinks_s

From an 1895 Strand feature on eccentric ideas, a mortarboard that “may be opened as shown during times of elemental disturbance.”

“It is to be unfolded and folded in a similar way possible with ungummed envelopes. By what manner of means it is to sustain its four unfolded corners, no man (even the inventor himself) knoweth.”