University of Minnesota Agricultural Experiment Station Bulletin No. 13 (December 1890), a treatise on growing flax for fibre and seed, based largely on European practice in Belgium, Germany, Ireland and elsewhere. It covers climate, soil, preparation, manuring, seed selection and sowing, weeding, crop rotation, the "Ländern" scaffolding method, pulling and harvesting, and producing good seed. It includes Lugger's report to the Governor on field experiments into a flax-sickness disease on exhausted land, plus a chapter by H. Leslie Osborn on the microscopic structure of the flax stem, with botanical plates and sections.