Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleCOAL THROUGH THE MICROSCOPE.AuthorsGuennel, G. K.PublicationSchool Science & Mathematics, 1951, Vol 51, Issue 7, p535ISSN0036-6803Publication typeArticleDOI10.1111/j.1949-8594.1951.tb06743.x