Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitlePROBLEM DEPARTMENT.AuthorsMills, C. N.PublicationSchool Science & Mathematics, 1927, Vol 27, Issue 3, p307ISSN0036-6803Publication typeArticleDOI10.1111/j.1949-8594.1927.tb05226.x