Ryan, John James2016-04-152016-04-1519481948b14677702(OCoLC)07821425(OCoLC)ocm07821425https://hdl.handle.net/2144/15961Thesis (M.A.)--Boston University, 1948. This item was digitized by the Internet Archive.en-USBased on investigation of the BU Libraries' staff, this work is free of known copyright restrictionsTopics suitable for the development of principles of chemistry as found from an analysis of four high school textbooksThesis/Dissertation