21. Number 20 - The Physiological Action of Nitrobenzene Vapor on Animals: Memoir Collection: Core Historical Literature of Agriculture Publisher: Cornell University, Agricultural Experiment Station Publication Place: Ithaca, N.Y. Date: 1919 Format: Issue
22. Number 21 - Studies in the Reversibility of the Colloidal Condition of Soils: Memoir Collection: Core Historical Literature of Agriculture Publisher: Cornell University, Agricultural Experiment Station Publication Place: Ithaca, N.Y. Date: 1919 Format: Issue
23. Number 22 - An Analysis of the Costs of Growing Potatoes: Memoir Collection: Core Historical Literature of Agriculture Publisher: Cornell University, Agricultural Experiment Station Publication Place: Ithaca, N.Y. Date: 1919 Format: Issue
24. Number 23 - The Inheritance of the Weak Awn in Certain Avena Crosses and Its Relation to Other Characters of the Oat Grain: Memoir Collection: Core Historical Literature of Agriculture Publisher: Cornell University, Agricultural Experiment Station Publication Place: Ithaca, N.Y. Date: 1919 Format: Issue
25. Number 24 - A Study of the Plant Lice Injuring the Foliage and Fruit of the Apple: Memoir Collection: Core Historical Literature of Agriculture Publisher: Cornell University, Agricultural Experiment Station Publication Place: Ithaca, N.Y. Date: 1919 Format: Issue
26. Number 25 - The Crane-Flies of New York. Part I. Distribution and Taxonomy of the Adult Flies: Memoir Collection: Core Historical Literature of Agriculture Publisher: Cornell University, Agricultural Experiment Station Publication Place: Ithaca, N.Y. Date: 1919 Format: Issue
27. Number 26 - The Dry Root-Rot of the Bean: Memoir Collection: Core Historical Literature of Agriculture Publisher: Cornell University, Agricultural Experiment Station Publication Place: Ithaca, N.Y. Date: 1919 Format: Issue
28. Number 27 - The Influence of Low Temperature on Soil Bacteria: Memoir Collection: Core Historical Literature of Agriculture Publisher: Cornell University, Agricultural Experiment Station Publication Place: Ithaca, N.Y. Date: 1919 Format: Issue
29. Number 28 - Cooperative Marketing in the Chautauqua-Erie Grape Industry: Memoir Collection: Core Historical Literature of Agriculture Publisher: Cornell University, Agricultural Experiment Station Publication Place: Ithaca, N.Y. Date: 1919 Format: Issue
30. Number 29 - The Lecithin Content of Butter and Its Possible Relationship to the Fishy Flavor: Memoir Collection: Core Historical Literature of Agriculture Publisher: Cornell University, Agricultural Experiment Station Publication Place: Ithaca, N.Y. Date: 1919 Format: Issue
