XXVI Journal of Agricultural Research voi.vi 



Influence of Barnyard Manure and Water upon the Bacterial Activ- 

 ities OF THE Soil 



Page 

 Fig. I. Curves of the ammonifying powers of soil in pots with varying quanti- 

 ties of manure and water 899 



2. Curves of the nitrifying powers of soil in pots with varying quanti- 



ties of manure and water 900 



3. Ctu^cs of the number of colonies of bacteria developing from fallow soil 



with varying quantities of manure and water 904 



4. Curves of the ammonifying powers of fallow soil with varying quanti- 



ties of manure and water 907 



5. Ctu^es of the nitrifying powers of fallow soil with varying quantities of 



manure and water 910 



6. Curves of the number of colonies of bacteria developing from cropped 



plats with varying quantities of manure 912 



7. Curves of the ammonifying powers of soil of cropped plats with varying 



quantities of manure and water 915 



8. Curves of the nitrifying powers of soil of cropped plats with varying 



quantities of manure and water 918 



9. Diagram of the influence of manure on the yield and bacterial activities 



of a soil 920 



ID. Diagram of the influence of irrigation water on the yield and bacterial 



activities of a soil 921 



Progressive Oxidation of Cold-Storage Butter 



Fig. 1. Diagram of gas apparatus used in the extraction and analysis of the air 



confined in butter 931 



Bacteriological Studies of a Soil Subjected to Different Systems of 

 Cropping for 25 Years 



Fig . I . Curves of the nitrate formation in soil of fertility plats at Columbia, Mo. , 

 in 1913-14, after 28 days' incubation with the addition of 60 mgm. of 

 nitrogen as cottonseed meal, but without the addition of calcium car- 

 bonate 962 



Studies on the Physiology of Reproduction in the Domestic Fowl. — 



XV. Dwarf Eggs 



Fig. I. Diagram showing the percentage of the yearly total egg production 

 (8-year average, 1899-1907) and the percentage of the total dwarf-egg 

 production (8-year average, 1908-1916) which occurred during each 

 month 1004 



2. Diagram showing for the years 1911-12 and 1914-15 combined the per- 



centage of the yearly total egg production and dwarf-egg production 

 which occurred during each month and 100 times the percentage of 

 the eggs produced each month which were dwarf 1005 



3. Diagram showing the number of dwarf eggs which occurred in each 



tenth of a litter loii 



4. Diagram showing the number of dwarf eggs which occurred in each fifth 



of a litter 1014 



