Contact: Laurel Bragstad Schaub
----Source: Greenwood Gleaner
(Greenwood, Wis.) 10-19-1900
"Necessity is the mother of invention." More black board was needed in the recitation room and Miss Patch, because she couldn’t easily make a black board, invented a blue board, on which charcoal is used instead of chalk. Greenwood Gleaner (Greenwood, Wis.) 10-19-1900
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