85. U. S. Department of Agriculture, Office of Experiment Stations Bulletin No. 149: Studies on the Food of Maine Lumbermen.
86. U. S. Department of Agriculture, Office of Experiment Stations Bulletin No. 143: Studies on the Digestibility and Nutritive Value of Bread at the Maine Experiment Station.
87. U. S. Department of Agriculture, Office of Experiment Stations, Experiment Station Work, Vol. III: Wells and Pure Water.
88. U. S. Department of Agriculture, Farmers' Bulletin No. 88: Pure Water on the Farm.
89 Mineral Impurities in Water. See various bulletins of the California and New Mexico Agricultural Experiment Stations.
90. Mason: Examination of Water.
91. Department of the Interior, U. S. Geological Survey: The Quality of Surface Waters in Minnesota.
92. Fuertes: Water and Public Health.
93. U. S. Department of Agriculture, Farmers' Bulletin No. 124: Distilled Drinking Water.
94. Turneaure and Russell: Public Water Supplies.