The SciencesThe European War and Potash SuppliesA Consideration of the Possible Sources of Material for Home ManufactureBy Thomas J. Keenan on February 6, 1915AdvertisementABOUT THE AUTHOR(S)Recent Articles by Thomas J. KeenanNew Sources of Pulp and PaperHow Waste Paper is Treated to Make New PaperEvolution of the Pulp and Paper Industry