14 DEPARTMENT OF AGRICULTURE, BULLS. 76-100. 



Oklahoma — 



agricultural extension work, 1913, statistics, 83, 35Htl. 



farmers' institute work, officials, statistics, 83, 5-6, 23, 25-27-32. 

 Olla abdominalis, predacious, on walnut plant lice, activities, 100, 38-39. 

 Oospora scabies, cause of potato scab, note, 81, 5. 



Orchards, apple, Pecos Valley, New Mexico, codling moth control, spraying experi- 

 ments, etc., 88, 2-8. 

 Oregon — 



agricultural extension work, 1913, statistics, 83, 35-41. 



farmers' institute work, officials, statistics, 83, 5-6, 23, 25, 27-32. 

 Ornamentals, value of udo, 84, 4. 

 Orton, W. A., bulletin on "The potato quarantine and the American potato industry," 



81, 1-20. 

 Osborn, powdery scab of potato, note, 82, 7. 

 Oxford down sheep — 



origin, development, distribution, value, etc., 94, 22-23, 57. 



scale of points, 84, 23. 



Pacific coast conifers, insect damage to cones and seeds, 95, 1-7. 

 Paper pulp — 



aspen, experimental cooking tests, record, 80, 47-59. 



aspen, properties, yield, and uses, 80, 44-47. 



production from wood, bibliography, 80, 61-63. 



soda, from aspens, effects of varying cooking conditions, 80, 1-63. 

 Paris green, use in tobacco wireworm control, 78, 26, 28. 

 Pasteurization — 



cream, tests of four city plants, 85, 6-12. 



milk, tests of four city plants, 85, 3-4. 

 asteurmng — 



apparatus, milk and cream, tests, 85, 2-4. 



milk and cream, cost, 85, 1-12. 



plants, milk, operations, 98, 74-77. 

 Pecan trees, infestation by walnut aphides, California, 100, 19 

 Pecos Valley, New Mexico, control of codling moth, 88, 1-8. 

 Pennsylvania — 



agricultural extension work, 1913, statistics, 83, 35-41. 



experiment station, tests of oat varieties, methods and results, 99, 18-19. 



farmers' institute work, officials, statistics, 83, 5-6, 23, 25, 27-32. 

 Persian— 



lambskins, source, demand, value, etc., 94, 53, 54. 



sheep, importations, value, discussion, 94, 55. 

 Pethybridge, powdery scab of potato, notes, 82, 7, 12, 13. 

 Petrographic microscope, description, 97, 2. 

 Petty morel, description, 84, 6. 



Phillips, E. F., and George S. Demuth, bulletin on "The temperature of the honey- 

 bee cluster in winter," 93, 1-16. 

 Phosphate rock, optical constants, 97, 11. 

 Phytophthora infestans, cause of late blight of potatoes, 81, 3. 

 Pine, mining timbers, crushing and bending tests, 77, 5, 6, 7, 21, 22, 23, 24, 25, 26-27, 



28-32. 

 Planing mills, location, relation to flumes, 87, 27. 



Plant Industry Bureau, cooperative studies of tobacco wireworm in Virginia, 78, 1-29. 

 Plantago lanceolata. See Plantain, buckhorn. 



