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22. Cyclopedia of American agriculture: a popular survey of agricultural conditions, practices and ideals in the United States and Canada
23. Photosynthesis and related processes
24. British stem- and leaf-Fungi (Coelomycetes): a contribution to our knowledge of the Fungi imperfecti belonging to the Sphaeropsidales and the Melanconiales
25. The Fungi
26. Rudimentary treatise on agricultural engineering
27. Transactions of the Third International Congress of Soil Science, Oxford, England, 1935
28. The Polish peasant in Europe and America: monograph of an immigrant group
29. Farm knowledge: a complete manual of successful farming written by recognized authorities in all parts of the country ; based on sound principles and the actual experience of real farmers : "the farmer's own cyclopedia"
30. Reinforced concrete construction
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