Xll ACKNOWLEDGMENTS 



Oregon Experiment Station at Corvallis, Frontispiece, 23, 124, 

 145 to 152, 154 to 177, 180, 182, 184 to 187, 189, 191 to 193, 

 302, 235 to 237 

 Rliode Island Experiment Station at Kingston__137 to 144, 240, 244 



Tennessee Experiment Station at Knoxville 234 to 266 



United States Department of Agriculture at Washington, D. C. 



301, 303, 305, 306, 308, 309 



\'crmont Experiment Station at Burlington 71, 205 to 208 



Washington Experiment Station at Pullman 247 



West \'irginia Experiment Station at Morgantown 



153, 238, 239, 242, 243, 245, 246, 250 to 253 



W. R. White of State College, Pa. 90 



E. F. Williamson of New York City 



10, 12, 13, 15, 17, 19, 106, 109, 113, 135. 136a, 263 

 Wisconsin Experiment Station at Madison 



11, 66, 67, 123, 127, 136, 194, 314 



