XXII EXPERIMENT STATION KECORD. [Vol.41 



Page. 

 Pierce, W. D., Contributions to Our Knowledge of the Weevils of the 



Superfamily Curculionoidea 261 



Pierce, W. D., Some Necessary Steps in Any Attempt to Prove Insect 



Transmission or Causation of Disease 456 



Pirtle, T. R., Factory Butter, Cheese, and Condensed IMilk Production 



During tlie War 473 



Pittier, H., On the Origin of Chicle, with Descriptions of Two New Species 



of Achras 653 



Pomeroy, C. S., Bud Vax'iations in Sugar Cane 337 



Popenoe, W., Avocados, Particuhirly Guatemalans 446 



Power, F. B., and V. K. Chestnut, Ilex vomltoria as a Native Source of 



Caffein 409 



Power, F. B., and V. K. Chestnut, An Improved Method for the Quantita- 

 tive Determination of Calfein in Vegetable Material 412 



Raffensperger, H. B., Ascarid Infestation in Swine , 784 



Raitt, J. A., Dairy Marketing Survey in Colorado 183 



Ramser, C. E., Progressive Erosion in a Dredged Drainage Cliannel 483 



Ramser, C. E., Hydraulic Efficiency of a Drainage Ditch for Five Differ- 

 ent Channel Conditions 687 



Ransom, B. H., and W. D. Foster, Recent Discoveries Concerning the Life 



History of Ascaris lumbricoidcs 285 



Ransom, B. H., Practical Methods of Prophylaxis against Worm Infesta- 

 tions 286 



Ransom, B. H., and B. Schwartz, Effects of Heat on TrichiniB 684 



Rhoads, A. S., Daldinia vemicosa, a Pyroxylophilous Fungus 546 



Ricliardson, H. W., The Northeastern Minnesota Forest Fires of October 



12,1918 48 



Ricker, D. A., Experiments with Poison Baits against Grasshoppers 252 



Roark, R. C, Plants Used as Insecticides 56 



Rohwer, S. A., Description of a New Cynipoid from Trinidad 261 



Rohwer, S. A., Descriptions of Four New Parasitic Hymenoptera 463 



Rommel, G. M., The Cattle Industry of the Southeast 869 



Rose, D. H., Blister Canker of Apple Trees, a Physiological and Chemical 



Study 347 



Rosenbaum, J., The Origin and Spread of Tomato Fruit Rots in Transit— 156 

 Russell, G. A., Effect of Removing the Pulp from Camphor Seed on Germi- 

 nation and the Subsequent Growth of the Seedlings '. 652 



Sasscer, E. R., Important Foreign Insect Pests Collected on Imported 



Nursery Stock in 1918 251 



Scales, F. M., The Cuprous Chlorid-Iodin Method for Reducing Sugars 



Simplified 412 



Scott L. B., Varieties of the Satsuma Orange 241 



Shamel, A. D., Some Results from an Experiment with Pruning as Com- 

 pared with no I'runing of Full Bearing Washington Navel Trees 241 



Shamel, A. D., Further Observations upon the Application of Manure in 



Citrus Orchards with the Furrow-manure System 741 



Shamel, A. D., Applying the Furrow Manure in Citrus Groves 837 



Slioar, C. L., Pathological Problems in the Distribution of Perishable 



Plant Products 154 



Shear, C, L., and N. E. Stevens, Plant Pathology To-day 450 



Shear, C. L,, Spoilage of Cranberries After Picking 836 



Shear, C. L., N. E. Stevens, and R. B. Wilcox, The Reduction of Cranberry 



Losses between Field and Consumer 836 



