Medill, J. D.2017-11-132017-11-131900-12-29YD-1900-12-29http://hdl.handle.net/20.500.11867/21173 sheets 22 x 16 inch. Printed. Chipped edges do not obscure context. Front page recto significantly dirty, which obscures context. Verso taped, which does not obscure context. Open voids throughout obscure context."Nitrogen From the Air. Sir William Crookes, the British scientist, thinks we are within 30 years of the end of our natural possibilities in what culture. In order to increase the average yield of wheat per acre and keep up with the increasing demand more nitrogenous fertilizer must be used."No Known Copyright The organization that has made the Item available reasonably believes that the Item is not restricted by copyright or related rights, but a conclusive determination could not be made. Please refer to the organization that has made the Item available for more information. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use.