Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitlePROBLEM DEPARTMENT.AuthorsNyberg, J. A.PublicationSchool Science & Mathematics, 1925, Vol 25, Issue 1, p84ISSN0036-6803Publication typeArticleDOI10.1111/j.1949-8594.1925.tb07541.x