INDEX. 15 



Plantain — 



buckhorn, crop rotation as control methods, 78, 15, 29. 



buckhorn, other names, 78, 15, 24, 29. 

 Plowing, fall and winter, effect on wireworm control, experiments and comparisons, 



78, 19-23, 29. 

 Polyporus pilotae, injury to chestnut trees, 89, 2. 

 Poplars, infestation with Armillaria mellea, New York, 89, 6. 

 Porto Rico — 



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



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

 Potash, sulphate, use in soil treatment for pototo powdery scab control, 82, 13. 

 Potassium — 



chloride, optical constants, 97, 10. 



sulphate, optical constants, 97, 10. 

 Potato — 



containers, sacks and barrels, responsibility for spread of powdery scab control, 

 82, 14. 



crop, 1913, situation, 81, 16-17. 



growing, possibilities in United States, suggestions, 81, 17-18. 



parasites, foreign, danger to American products, etc., 81, 2-4. 



quarantine and the American potato industry, 81, 1-20. 



wart disease, description, cause, danger, etc., 81, 4. 

 Potato-disease situation, review, 81, 2. 

 Potatoes — 



imports, certificates, inspection, limitations, etc., requirements, 81, 14-15. 



imports, danger of wart disease and powdery scab, 81, 4, 5-7. 



imports from Europe, presence of powdery scab, 81, 5-6. 



imports, relation to domestic stock, 81, 15-16. 



loss from diseases, 81, 2. 



production, prices, exports and imports, annual, 1900-1912, 81, 10. 



protection from disease, suggestions, 81, 18-19. 



quarantine, orders by Secretary, 81, 11-12. 



scabby, marketing, Great Britain and America, 81, 9-10. 



surplus stock, suggestions, 81, 19-20. 

 Powdery scab — 



danger to potato industry, discussion, 81, 7. 



infection of American stock, modes, 81, 6-7. 



potato, communicability, 81, 8. 



potato, comparison with common scab, 81, 5, 10. 



potato, description, distribution, preventive measures, etc., 81, 4-12. 



potato, importance in Europe, comments, 81, 9. 



potato, occurrence in United States, 81, 8. 



potato, quarantine, remarks, 81, 10. 



quarantine, orders by Secretary, 81, 11-12. 

 Power machines, use in stump pulling, 91, 10. 

 Preservative treatment, mine timbers, note, 77, 15-16. 

 Prussia, agricultural extension work, notes, 83, 18-19. 

 Pulp- 

 production, experiments with aspen, soda process, 80, 14-40. 



production from aspen, cost, influence of cooking conditions, 80, 31-38. 



production from wood, soda method, investigations, 80, 4-8. 



production, soda process, 80, 2-4. 



production, soda process, methods used in experiments, 80, 9-14. 



wood, aspen, effects of varying cooking conditions in producing soda pulp, 80, 

 1-63. 



