ACKNOWLEDGMENTS The authors wish to acknowledge their indebtedness to Dr. William Bishop Owen, principal of the Chicago Normal College; Miss Lucy Marian Doyle, of the Parker Practice School, Chicago; Miss Mary E. Tobin, principal of the Marquette School, Chicago; and Miss Ada C. Dyson, of the same school. For the examples of lettering and the accompanying explanation, thanks are due to Mr. Ernst F. Detterer, of the Chicago Normal College. |