Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleILLINOIS STATE ACADEMY OF SCIENCE.AuthorsPHIPPS, C. F.PublicationSchool Science & Mathematics, 1924, Vol 24, Issue 7, p760ISSN0036-6803Publication typeArticleDOI10.1111/j.1949-8594.1924.tb02368.x