1918] CONTENTS. XXV 



Page. 

 Oberholser, H. C, Fringilline Genus Passerherbulus and Its Nearest 



Allies 556 



Oberholser, H. C. Review of Subspecies of the Leach Petrel, Oceano- 



droma leucorhoa 556 



Oberholser, H. C, Status of Aphelocoma cyanotis and Its Allies 556 



Oberholser, H. C, Diagnosis of a New Pycnonotine Family of Passeri- 



formes 856 



Okey, C. W., Subsidence of Muck and Peat Soils in Southern Louisiana 



and Florida 690 



Orton, W. A., Potato Diseases in Bermuda 149 



Paine, J. H., Asymmetrical Bird Louse Found on Troupials 56 



Palkin, S., Separation of Aluminum from Iron by Means of Ether 10 



Palmer, A. H.. California Earthquake during 1916 115 



Palmer, A. H., Snow and Its Value to the Farmer 416 



Palmer, R. C, Effect of Catalyzers in the Destructive Distillation of 



Hardwoods 808 



Palmer, R. C, Effect of Incomplete Distillation in the Destructive Distil- 

 lation of Birch 808 



Palmer, R. C, and Cloukey, H., Influence of Moisture in the Destructive 



Distillation of Hardwood 808 



Palmer, T. S., American Game Protection 652 



Pearson, G. A., Yield and Reproduction of Western Yellow Pine in Ari- 

 zona and New Mexico 847 



Pemberton, C. E., and Willard, H. F., New Parasite Cages 566 



Phillips, E. F., Extension Work in Beekeeping 164 



Pieper, E. J., Humphrey, C. J., and Acree, S. F., Synthetic Culture Media 



for Wood-destroying Fungi 254 



Popenoe, W., and Simmonds. E., Where and How to Grow Avocados 541 



Powell, Ola, Successful Canning and Preserving 114 



Quaintance, A. L., and Shear, C. L., Increase in the Grape Yield by 



Spraying 144 



Rabak, F., Influence of Time of Harvest, Drying, and Freezing of Spear- 

 mint upon the Oil 807 



Rabak, F., Utilization of Waste Tomato Seeds and Skins 80S 



Reed, C. A., Selecting Nut Trees for Planting 44 



Reed, C. A., Proper Place of Nut Trees in the Planting Program 542 



Reed, E. O., Determining the Absorbency of Pajper 414 



Reed, W. G., Frost in the United States 415 



Robinson, W. O., Determination of Rubidium and Caesium in Plant Ash 412 



Rogers, L. A., Viability of Colon-aerogenes Bacteria in Water 488 



Rohwer, S. A., Thirty-one New Species of Hymenoptera 164 



Rohwer, S. A., North American Wasps of the Subgenus Pemphredon 660 



Rohwer, S. A., and Fagan, Margaret M., Type Species of the Genera of 



the Cynipoidea, or the Gall Wasps and Parasitic Cynipoids 63 



Rommel, G. M., The Hen's Annual Vacation 172 



Ross, W. H., and Merz, A. R., Water-soluble Potash as a By-Product in 



the Cement Industry 124 



Round, L. A., and Gore, H. C, Making of Potato Silage for Cattle Food— 207 



Rudolph, B. A., New Leaf Spot Disease of Cherries 251 



SafEord, W. E., Food Plants and Textiles of Ancient America 167 



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



Nursery Stock in 1917 857 



Scammell, H. B., Fall Army Worm in Its Relation to Cranberry Bogs 159 



